ci: add GitHub Actions CI, CodeQL, Dependabot, auto-labeler, PR template, and issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug or unexpected behavior in git-ai
+title: '[Bug] '
+labels: ['bug', 'triage']
+assignees: ''
+---
+
+## Bug Description
+
+<!-- A clear and concise description of what the bug is. -->
+
+## Steps to Reproduce
+
+1. Run `git-ai ...`
+2. See error
+
+## Expected Behavior
+
+<!-- What you expected to happen. -->
+
+## Actual Behavior
+
+<!-- What actually happened. Include error messages or stack traces if available. -->
+
+## Environment
+
+- **OS:** <!-- e.g. macOS 14, Ubuntu 22.04, Windows 11 -->
+- **Node.js version:** <!-- e.g. 20.x -->
+- **git-ai version:** <!-- e.g. 1.0.0 -->
+- **Git version:** <!-- e.g. 2.43.0 -->
+- **AI provider:** <!-- e.g. OpenAI, Gemini -->
+
+## Logs / Stack Trace
+
+```
+<!-- Paste any relevant logs or stack traces here. -->
+```
+
+## Additional Context
+
+<!-- Any other context about the problem. Screenshots, related issues, etc. -->

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: 💬 Discussion / Question
+    url: https://github.com/BeyteFlow/git-ai/discussions
+    about: Ask questions and discuss ideas in GitHub Discussions

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest a new feature or improvement for git-ai
+title: '[Feature] '
+labels: ['enhancement', 'triage']
+assignees: ''
+---
+
+## Feature Description
+
+<!-- A clear and concise description of the feature you would like. -->
+
+## Problem It Solves
+
+<!-- Describe the problem or pain point this feature would address. -->
+<!-- e.g. "I always have to manually ... when I want to ..." -->
+
+## Proposed Solution
+
+<!-- Describe how you envision this feature working. -->
+
+## Alternatives Considered
+
+<!-- Have you considered any alternative approaches or workarounds? -->
+
+## Additional Context
+
+<!-- Any other context, mockups, or screenshots about the feature request. -->
+
+## Would you be willing to contribute this feature?
+
+- [ ] Yes, I'd like to open a PR for this
+- [ ] No, I'm just suggesting

.github/dependabot.yml

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+version: 2
+updates:
+  # Maintain dependencies for npm
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+      time: '09:00'
+    open-pull-requests-limit: 10
+    labels:
+      - 'dependencies'
+    commit-message:
+      prefix: 'chore(deps)'
+      prefix-development: 'chore(deps-dev)'
+    groups:
+      production-dependencies:
+        dependency-type: 'production'
+      development-dependencies:
+        dependency-type: 'development'
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+      time: '09:00'
+    open-pull-requests-limit: 10
+    labels:
+      - 'dependencies'
+      - 'ci/cd'
+    commit-message:
+      prefix: 'chore(actions)'

.github/labeler.yml

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+# Pull Request auto-labeler configuration
+# https://github.com/actions/labeler
+
+'ci/cd':
+  - changed-files:
+    - any-glob-to-any-file:
+      - '.github/**'
+
+'dependencies':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'package.json'
+      - 'package-lock.json'
+      - 'yarn.lock'
+
+'documentation':
+  - changed-files:
+    - any-glob-to-any-file:
+      - '**/*.md'
+      - 'docs/**'
+
+'cli':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/cli/**'
+
+'core':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/core/**'
+
+'ai':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/services/aiService.ts'
+
+'git':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/services/gitService.ts'
+
+'github':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/services/githubService.ts'
+
+'ui':
+  - changed-files:
+    - any-glob-to-any-file:
+      - 'src/ui/**'
+
+'tests':
+  - changed-files:
+    - any-glob-to-any-file:
+      - '**/*.test.ts'
+      - '**/*.spec.ts'
+      - 'tests/**'

.github/pull_request_template.md

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+## Description
+
+<!-- A clear and concise description of what this PR does. -->
+
+## Related Issue
+
+<!-- Link to the issue this PR addresses, e.g. Closes #123 -->
+
+Closes #
+
+## Type of Change
+
+<!-- Mark the relevant option with an [x]. -->
+
+- [ ] 🐛 Bug fix (non-breaking change that fixes an issue)
+- [ ] ✨ New feature (non-breaking change that adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to change)
+- [ ] 📝 Documentation update
+- [ ] 🔧 Refactor / internal improvement
+- [ ] 🤖 CI/CD or tooling change
+- [ ] ⬆️ Dependency update
+
+## Checklist
+
+- [ ] I have read the [CONTRIBUTING](../CONTRIBUTING.md) guidelines (if present)
+- [ ] My code follows the existing code style
+- [ ] I have added or updated tests that cover my changes
+- [ ] All existing tests pass locally
+- [ ] I have updated the documentation where necessary
+- [ ] My changes do not introduce new security vulnerabilities
+
+## How Has This Been Tested?
+
+<!-- Describe how you tested your changes. -->
+
+## Screenshots (if applicable)
+
+<!-- Add screenshots to help explain your changes. -->
+
+## Additional Notes
+
+<!-- Any additional context or information. -->

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  build-and-test:
+    name: Build & Test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint --if-present
+
+      - name: Build
+        run: npm run build --if-present
+
+      - name: Run tests
+        run: npm test --if-present

.github/workflows/codeql.yml

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+name: CodeQL
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+  schedule:
+    - cron: '30 4 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      packages: read
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [javascript-typescript]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-extended,security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: '/language:${{ matrix.language }}'

.github/workflows/labeler.yml

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+name: Labeler
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  issues:
+    types: [opened, reopened]
+
+jobs:
+  label-pr:
+    name: Label Pull Request
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+      - name: Label PR based on changed files
+        uses: actions/labeler@v5
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          configuration-path: .github/labeler.yml
+
+  label-issue:
+    name: Label Issue
+    runs-on: ubuntu-latest
+    if: github.event_name == 'issues'
+    permissions:
+      issues: write
+
+    steps:
+      - name: Add triage label to new issues
+        uses: actions/github-script@v7
+        with:
+          script: |
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              labels: ['triage']
+            });