CI: add code quality workflows (#30)

Author: thekaveman

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/" # pyproject.toml
+    schedule:
+      interval: "daily"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    labels:
+      - "dependencies"
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    labels:
+      - "dependencies"

.github/workflows/codeql.yml

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+# https://codeql.github.com/
+name: CodeQL
+
+on:
+  push:
+    paths:
+      - "**.js"
+      - "**.py"
+  pull_request:
+    branches: [main]
+    paths:
+      - "**.js"
+      - "**.py"
+  schedule:
+    - cron: "24 9 * * 6"
+
+jobs:
+  setup:
+    name: Set up CodeQL analysis
+    runs-on: ubuntu-latest
+    # Required permissions
+    permissions:
+      pull-requests: read
+    outputs:
+      # changes is a JSON array with names of all filters matching any of the changed files
+      languages: ${{ steps.filter.outputs.changes }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            javascript: "**.js"
+            python: "**.py"
+
+  codeql:
+    name: CodeQL Analyze
+    runs-on: ubuntu-latest
+    needs: setup
+    if: ${{ needs.setup.outputs.languages != '[]' }}
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        # Parse JSON array containing names of all filters matching any of changed files
+        # e.g. ['javascript', 'python'] if both file types had changes
+        language: ${{ fromJSON(needs.setup.outputs.languages) }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          # https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning#specifying-configuration-details-using-the-config-input
+          config: |
+            paths-ignore:
+              - tests
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

.github/workflows/dependency-triage.yml

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+name: "Dependency PR triage"
+
+on:
+  pull_request:
+    types: [opened]
+
+jobs:
+  dependency-triage:
+    runs-on: ubuntu-latest
+    # see https://docs.github.com/en/code-security/dependabot/working-with-dependabot/automating-dependabot-with-github-actions#responding-to-events
+    if: github.actor == 'dependabot[bot]' || github.actor == 'pre-commit-ci[bot]'
+    steps:
+      - uses: actions/add-to-project@main
+        with:
+          project-url: https://github.com/orgs/compiler/projects/${{ vars.GH_PROJECT }}
+          github-token: ${{ secrets.GH_PROJECTS_TOKEN }}
+
+      - uses: EndBug/project-fields@v2
+        with:
+          operation: set
+          fields: Effort,Status
+          values: 1,In review
+          project_url: https://github.com/orgs/compiler/projects/${{ vars.GH_PROJECT }}
+          github_token: ${{ secrets.GH_PROJECTS_TOKEN }}

.github/workflows/labeler-actions.yml

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+name: Label actions
+
+on:
+  pull_request:
+    types: [opened]
+    paths:
+      - ".github/dependabot.yml"
+      - ".github/workflows/**"
+
+jobs:
+  label-actions:
+    runs-on: ubuntu-latest
+    steps:
+      - name: add-label
+        uses: andymckay/labeler@master
+        with:
+          add-labels: "actions"

.github/workflows/labeler-docs.yml

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+name: Label docs
+
+on:
+  pull_request:
+    branches: [main]
+    types: [opened]
+    paths:
+      - "docs/**"
+      - "mkdocs.yml"
+      - ".github/workflows/mkdocs.yml"
+
+jobs:
+  label-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: add-label
+        uses: andymckay/labeler@master
+        with:
+          add-labels: "documentation"