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/predicatesTest.php

@@ -0,0 +1,57 @@
+<?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;
+
+use PHPUnit\Framework\TestCase;
+use Parsica\Parsica\PHPUnit\ParserAssertions;
+use function Parsica\Parsica\{andPred, isEqual, notPred, orPred, satisfy};
+
+final class predicatesTest extends TestCase
+{
+    use ParserAssertions;
+
+    /** @test */
+    public function isEqual()
+    {
+        $this->assertTrue(isEqual('x')('x'));
+        $this->assertFalse(isEqual('x')('y'));
+    }
+
+    /** @test */
+    public function notPred()
+    {
+        $this->assertFalse(notPred(isEqual('x'))('x'));
+        $this->assertTrue(notPred(isEqual('x'))('y'));
+
+        $parser = satisfy(notPred(isEqual('x')));
+        $this->assertParseFails("xyz", $parser);
+        $this->assertParses("yz", $parser, "y");
+        $this->assertParseFails("", $parser, "satisfy(predicate)");
+    }
+
+    /** @test */
+    public function orPred()
+    {
+        $predicate = orPred(isEqual('x'), isEqual('y'));
+        $this->assertTrue($predicate('x'));
+        $this->assertTrue($predicate('y'));
+        $this->assertFalse($predicate('z'));
+    }
+
+    /** @test */
+    public function andPred()
+    {
+        $predicate = andPred(isEqual('x'), isEqual('x'));
+        $this->assertTrue($predicate('x'));
+        $this->assertFalse($predicate('y'));
+    }
+}
+