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/ParseResultTest.php

@@ -0,0 +1,39 @@
+<?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\StringStream;
+use function Parsica\Parsica\char;
+
+final class ParseResultTest extends TestCase
+{
+
+    /** @test */
+    public function ParseSuccess_continueWith()
+    {
+        $input = new StringStream("abc");
+        $success = char('a')->run($input);
+        $result = $success->continueWith(char('b'));
+        $this->assertTrue($result->isSuccess());
+        $this->assertEquals("c", $result->remainder());
+    }
+
+    /** @test */
+    public function ParseFailure_continueWith()
+    {
+        $input = new StringStream("abc");
+        $fail = char('x')->run($input);
+        $result = $fail->continueWith(char('a'));
+        $this->assertTrue($result->isFail());
+    }
+
+}