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/phpbench.json

@@ -0,0 +1,7 @@
+{
+  "bootstrap": "vendor/autoload.php",
+  "path": "tests/bench",
+  "extensions": [
+    "PhpBench\\Extensions\\XDebug\\XDebugExtension"
+  ]
+}