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/squizlabs/php_codesniffer/tests/AllTests.php

@@ -0,0 +1,58 @@
+<?php
+/**
+ * A test class for running all PHP_CodeSniffer unit tests.
+ *
+ * @author    Greg Sherwood <gsherwood@squiz.net>
+ * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
+ */
+
+namespace PHP_CodeSniffer\Tests;
+
+require_once 'Core/AllTests.php';
+require_once 'Standards/AllSniffs.php';
+
+// PHPUnit 7 made the TestSuite run() method incompatible with
+// older PHPUnit versions due to return type hints, so maintain
+// two different suite objects.
+$phpunit7 = false;
+if (class_exists('\PHPUnit\Runner\Version') === true) {
+    $version = \PHPUnit\Runner\Version::id();
+    if (version_compare($version, '7.0', '>=') === true) {
+        $phpunit7 = true;
+    }
+}
+
+if ($phpunit7 === true) {
+    include_once 'TestSuite7.php';
+} else {
+    include_once 'TestSuite.php';
+}
+
+class PHP_CodeSniffer_AllTests
+{
+
+
+    /**
+     * Add all PHP_CodeSniffer test suites into a single test suite.
+     *
+     * @return \PHPUnit\Framework\TestSuite
+     */
+    public static function suite()
+    {
+        $GLOBALS['PHP_CODESNIFFER_STANDARD_DIRS'] = [];
+        $GLOBALS['PHP_CODESNIFFER_TEST_DIRS']     = [];
+
+        // Use a special PHP_CodeSniffer test suite so that we can
+        // unset our autoload function after the run.
+        $suite = new TestSuite('PHP CodeSniffer');
+
+        $suite->addTest(Core\AllTests::suite());
+        $suite->addTest(Standards\AllSniffs::suite());
+
+        return $suite;
+
+    }//end suite()
+
+
+}//end class