Add GitHub contribution templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report a reproducible CodexClaw problem
+title: ''
+labels: bug
+assignees: ''
+---
+
+## What happened
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Expected behavior
+
+## Environment
+
+- OS:
+- Node:
+- pnpm:
+- Codex CLI:
+- CodexClaw commit:
+
+## Verification
+
+- [ ] I ran `pnpm -C apps/codex-claw test`
+- [ ] I ran `pnpm -C apps/codex-claw build`
+- [ ] I included the relevant error text or screenshot

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Propose a focused CodexClaw alpha improvement
+title: ''
+labels: enhancement
+assignees: ''
+---
+
+## Problem
+
+## Proposed behavior
+
+## Why this belongs in CodexClaw
+
+## Alpha impact
+
+- [ ] improves local Codex CLI usage
+- [ ] keeps setup simple
+- [ ] avoids hosted-service assumptions
+
+## Notes

.github/pull_request_template.md

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+## Summary
+
+## Issue
+
+Closes #
+
+## Verification
+
+- [ ] `pnpm -C apps/codex-claw test`
+- [ ] `pnpm -C apps/codex-claw build`
+- [ ] `pnpm -C apps/landing build` if landing changed
+- [ ] Manual Codex CLI smoke test if adapter behavior changed
+
+## Risk
+
+## Notes