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/parsica-php/parsica/tests/JSON/JSONTest.php

@@ -0,0 +1,64 @@
+<?php declare(strict_types=1);
+/**
+ * This file is part of the Parsica library.
+ *
+ * Copyright (c) 2020 Mathias Verraes <mathias@verraes.net>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Tests\Parsica\Parsica\JSON;
+
+use PHPUnit\Framework\TestCase;
+use Parsica\Parsica\JSON\JSON;
+
+final class JSONTest extends TestCase
+{
+    public static function examples(): array
+    {
+        return [
+            ['true'],
+            ['false'],
+            ['null'],
+            ['"abc"'],
+            ['{"a b":"c d"}'],
+            [' { " a b  " : " c  d " } '],
+            [' [ { " a b  " : " c  d " } ] '],
+            [' [ { " a b  " : " c  d " } , { "ef" : "gh" } ] '],
+            ['"some weird chars \\n in \\t strings \\u9999 should do it"'],
+            ['"this \\\\ is just a backslash"'],
+            [<<<JSON
+                [
+                    -1.23,
+                    null,
+                    true,
+                    [
+                        [
+                            {
+                                "a": true
+                            },
+                            {
+                                "b": false,
+                                "c": -1.23456789E+123
+                            }
+                        ]
+                    ]
+                ]
+                JSON,
+            ],
+            [file_get_contents(__DIR__ . '/../../composer.json')],
+        ];
+    }
+
+    /**
+     * @test
+     * @dataProvider examples
+     */
+    public function compare_to_json_decode(string $input)
+    {
+        $native = json_decode($input);
+        $parsica = JSON::json()->tryString($input)->output();
+        $this->assertEquals($native, $parsica);
+    }
+}