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/ParseResult/FunctorTest.php

@@ -0,0 +1,40 @@
+<?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\ParseResult;
+
+use PHPUnit\Framework\TestCase;
+use Parsica\Parsica\Internal\Fail;
+use Parsica\Parsica\Internal\Succeed;
+use Parsica\Parsica\PHPUnit\ParserAssertions;
+use Parsica\Parsica\StringStream;
+
+final class FunctorTest extends TestCase
+{
+    use ParserAssertions;
+
+    /** @test */
+    public function map_over_ParseSuccess()
+    {
+        $succeed = new Succeed("parsed", new StringStream("remainder"));
+        $expected = new Succeed("PARSED", new StringStream("remainder"));
+        $this->assertEquals($expected, $succeed->map('strtoupper'));
+    }
+
+    /** @test */
+    public function map_over_ParseFailure()
+    {
+        $remainder = new StringStream("");
+        $fail = new Fail("expected", new StringStream("got"));
+        $expected = new Fail("expected", new StringStream("got"));
+        $this->assertEquals($expected, $fail->map('strtoupper'));
+    }
+
+}