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/flyfinder/examples/02-find-on-multiple-criteria.php

@@ -0,0 +1,42 @@
+<?php
+require_once(__DIR__ . '/../vendor/autoload.php');
+
+use League\Flysystem\Filesystem;
+use League\Flysystem\Memory\MemoryAdapter as Adapter;
+use Flyfinder\Finder;
+use Flyfinder\Path;
+use Flyfinder\Specification\IsHidden;
+use Flyfinder\Specification\HasExtension;
+use Flyfinder\Specification\InPath;
+
+/*
+ * First create a new Filesystem and add the FlySystem plugin
+ * In this example we are using a filesystem with the memory adapter
+ */
+$filesystem = new Filesystem(new Adapter());
+$filesystem->addPlugin(new Finder());
+
+// Create some demo files
+$filesystem->write('test.txt', 'test');
+$filesystem->write('.hiddendir/.test.txt', 'test');
+$filesystem->write('.hiddendir/found.txt', 'test');
+$filesystem->write('.hiddendir/normaldir/example.txt', 'test');
+
+/*
+ * In order to tell FlyFinder what to find, you need to give it a specification
+ * In this example the specification will be satisfied by *.txt files
+ * within the .hidden directory and its subdirectories that are not hidden
+ */
+$isHidden = new IsHidden();
+$hasExtension = new HasExtension(['txt']);
+$inPath = new InPath(new Path('.hiddendir'));
+$specification = $inPath->andSpecification($hasExtension)->andSpecification($isHidden->notSpecification());
+
+//FlyFinder will yield a generator object with the files that are found
+$generator = $filesystem->find($specification);
+
+$result = [];
+
+foreach ($generator as $value) {
+    $result[] = $value;
+}