refactor: Cleanup git state - commit all staged changes

Major refactoring cleanup:
- Add new controller architecture (class-controller-*.php)
- Add new settings-v2 UI (views/settings-v2/)
- Add new CSS architecture (agentic-sidebar.css, tokens)
- Add esbuild build pipeline (scripts/build.js, package.json)
- Add composer dependencies (vendor/)
- Add frontend src directory (assets/js/src/index.jsx)
- Add documentation files
- Remove old/obsolete files (class-settings.php, old CSS)

This commits all pending changes from previous refactoring efforts.

vendor/phpdocumentor/reflection/.github/workflows/dependabot-auto-merge.yml

@@ -0,0 +1,24 @@
+name: "Dependabot auto-merge"
+
+on: # yamllint disable-line rule:truthy
+  pull_request_target: null
+
+permissions:
+  contents: "write"
+
+jobs:
+  dependabot:
+    runs-on: "ubuntu-latest"
+    if: "${{ github.actor == 'dependabot[bot]' }}"
+    steps:
+      - name: "Dependabot metadata"
+        id: "metadata"
+        uses: "dependabot/fetch-metadata@v2.5.0"
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: "Enable auto-merge for Dependabot PRs"
+        if: "${{ steps.dependabot-metadata.outputs.update-type != 'version-update:semver-major' }}"
+        run: "gh pr merge --auto --merge \"$PR_URL\""
+        env:
+          PR_URL: "${{github.event.pull_request.html_url}}"
+          GITHUB_TOKEN: "${{secrets.GITHUB_TOKEN}}"