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/docs/index.rst

@@ -0,0 +1,29 @@
+Reflection
+==========
+
+Using this library it is possible to statically reflect one or more files and create an object graph representing
+your application's structure, including accompanying in-source documentation using DocBlocks.
+
+The information that this library provides is similar to what the (built-in) Reflection extension of PHP provides; there
+are however several advantages to using this library:
+
+- Due to its Static nature it does not execute procedural code in your reflected files where Dynamic Reflection does.
+- Because the none of the code is interpreted by PHP (and executed) Static Reflection uses less memory.
+- Can reflect complete files
+- Can reflect a whole project by reflecting multiple files.
+- Reflects the contents of a DocBlock instead of just mentioning there is one.
+- Is capable of analyzing code written for any PHP version (starting at 5.2) up to the lastest version, even if your installed
+    PHP version is lower than the code you are reflecting.
+
+.. note::
+    As this library focuses on reflecting the structure of the codebase, it does not provide any options to manipulate
+    the output. If you want to collect more information from the codebase you can read about :ref:`extending the library <extending>`.
+
+.. toctree::
+   :hidden:
+   :maxdepth: 2
+
+   getting-started
+   reflection-structure
+   expressions
+   extending/index