Create codeql.yml (#79)

This change adds a CodeQL config that includes Python and Actions as the things checked by CodeQL.

Author: tofu-rocketry

.github/workflows/codeql.yml

@@ -0,0 +1,50 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "dev" ]
+    # Can't use the paths-ignore with 'push' as this would cause missing analyses.
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "dev" ]
+    paths-ignore:
+      - '**/*.md'
+      - '**/*.txt'
+      - '**/*.sh'
+  schedule:
+    - cron: '33 13 * * 2'
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    if: '!github.event.repository.fork'
+
+    permissions:
+      # required for all workflows
+      security-events: write
+      # required to fetch internal or private CodeQL packs
+      packages: read
+      # only required for workflows in private repositories
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ actions, python ]
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v4
+      with:
+        languages: ${{ matrix.language }}
+
+        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        queries: security-extended,security-and-quality
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v4