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/bootstrap.php

@@ -0,0 +1,99 @@
+<?php
+/**
+ * Bootstrap file for PHP_CodeSniffer unit tests.
+ *
+ * @author    Greg Sherwood <gsherwood@squiz.net>
+ * @copyright 2006-2017 Squiz Pty Ltd (ABN 77 084 670 600)
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
+ */
+
+if (defined('PHP_CODESNIFFER_IN_TESTS') === false) {
+    define('PHP_CODESNIFFER_IN_TESTS', true);
+}
+
+/*
+ * Determine whether the test suite should be run in CBF mode.
+ *
+ * Use `<php><env name="PHP_CODESNIFFER_CBF" value="1"/></php>` in a `phpunit.xml` file
+ * or set the ENV variable at an OS-level to enable CBF mode.
+ *
+ * To run the CBF specific tests, use the following command:
+ * vendor/bin/phpunit --group CBF --exclude-group nothing
+ *
+ * If the ENV variable has not been set, or is set to "false", the tests will run in CS mode.
+ */
+
+if (defined('PHP_CODESNIFFER_CBF') === false) {
+    $cbfMode = getenv('PHP_CODESNIFFER_CBF');
+    if ($cbfMode === '1') {
+        define('PHP_CODESNIFFER_CBF', true);
+        echo 'Note: Tests are running in "CBF" mode'.PHP_EOL.PHP_EOL;
+    } else {
+        define('PHP_CODESNIFFER_CBF', false);
+        echo 'Note: Tests are running in "CS" mode'.PHP_EOL.PHP_EOL;
+    }
+}
+
+if (defined('PHP_CODESNIFFER_VERBOSITY') === false) {
+    define('PHP_CODESNIFFER_VERBOSITY', 0);
+}
+
+require_once __DIR__.'/../autoload.php';
+
+$tokens = new \PHP_CodeSniffer\Util\Tokens();
+
+// Compatibility for PHPUnit < 6 and PHPUnit 6+.
+if (class_exists('PHPUnit_Framework_TestSuite') === true && class_exists('PHPUnit\Framework\TestSuite') === false) {
+    class_alias('PHPUnit_Framework_TestSuite', 'PHPUnit'.'\Framework\TestSuite');
+}
+
+if (class_exists('PHPUnit_Framework_TestCase') === true && class_exists('PHPUnit\Framework\TestCase') === false) {
+    class_alias('PHPUnit_Framework_TestCase', 'PHPUnit'.'\Framework\TestCase');
+}
+
+if (class_exists('PHPUnit_TextUI_TestRunner') === true && class_exists('PHPUnit\TextUI\TestRunner') === false) {
+    class_alias('PHPUnit_TextUI_TestRunner', 'PHPUnit'.'\TextUI\TestRunner');
+}
+
+if (class_exists('PHPUnit_Framework_TestResult') === true && class_exists('PHPUnit\Framework\TestResult') === false) {
+    class_alias('PHPUnit_Framework_TestResult', 'PHPUnit'.'\Framework\TestResult');
+}
+
+
+/**
+ * A global util function to help print unit test fixing data.
+ *
+ * @return void
+ */
+function printPHPCodeSnifferTestOutput()
+{
+    echo PHP_EOL.PHP_EOL;
+
+    $output = 'The test files';
+    $data   = [];
+
+    $codeCount = count($GLOBALS['PHP_CODESNIFFER_SNIFF_CODES']);
+    if (empty($GLOBALS['PHP_CODESNIFFER_SNIFF_CASE_FILES']) === false) {
+        $files     = call_user_func_array('array_merge', $GLOBALS['PHP_CODESNIFFER_SNIFF_CASE_FILES']);
+        $files     = array_unique($files);
+        $fileCount = count($files);
+
+        $output = '%d sniff test files';
+        $data[] = $fileCount;
+    }
+
+    $output .= ' generated %d unique error codes';
+    $data[]  = $codeCount;
+
+    if ($codeCount > 0) {
+        $fixes   = count($GLOBALS['PHP_CODESNIFFER_FIXABLE_CODES']);
+        $percent = round(($fixes / $codeCount * 100), 2);
+
+        $output .= '; %d were fixable (%d%%)';
+        $data[]  = $fixes;
+        $data[]  = $percent;
+    }
+
+    vprintf($output, $data);
+
+}//end printPHPCodeSnifferTestOutput()