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/Internal/FP/CurryTest.php

@@ -0,0 +1,47 @@
+<?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\Internal\FP;
+
+use PHPUnit\Framework\TestCase;
+use function Parsica\Parsica\Curry\curry;
+
+final class CurryTest extends TestCase
+{
+    /** @test */
+    public function curry()
+    {
+        $f = fn($a, $b, $c) => $a + $b + $c;
+        $curried = curry($f);
+
+        $this->assertIsCallable($curried);
+        $this->assertIsCallable($curried(1));
+        $this->assertIsCallable($curried(1)(2));
+        $this->assertIsCallable($curried(1)(2));
+
+        $this->assertEquals(6, $curried(1)(2)(3));
+    }
+
+    /** @test */
+    public function partial_application()
+    {
+        $f = fn($a, $b, $c) => $a + $b + $c;
+
+        $this->assertIsCallable(curry($f, 1));
+        $this->assertIsCallable(curry($f, 1, 2));
+
+        // I would expect this:
+//        $this->assertEquals(6, curry($f, 1, 2, 3));
+
+        // But we must add a () at the end, which I feel is a bug:
+        $this->assertIsCallable(curry($f, 1, 2, 3));
+        $this->assertEquals(6, curry($f, 1, 2, 3)());
+    }
+}

vendor/parsica-php/parsica/tests/Internal/FP/FoldrTest.php

@@ -0,0 +1,59 @@
+<?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\Internal\FP;
+
+use PHPUnit\Framework\TestCase;
+use function Parsica\Parsica\Internal\FP\foldr;
+
+final class FoldrTest extends TestCase
+{
+    /** @test */
+    public function sum_implemented_as_foldr()
+    {
+        $actual = foldr([1, 2, 3], fn ($x, $y) => $x + $y, 0);
+        $this->assertSame(6, $actual);
+    }
+
+    /** @test */
+    public function associativity_is_correct()
+    {
+        $minus = fn($x, $y) => $x - $y;
+        $input = [1, 2, 3, 4, 5];
+        $init = 0;
+
+        // foldl: ((((0 - 1) - 2) - 3) - 4) - 5) = -15
+        // foldr: (1 - (2 - (3 - (4 - (5 - 0))))) = 3
+
+        $actual = array_reduce($input, $minus, $init);
+        $this->assertSame(-15, $actual);
+
+        $actual = foldr($input, $minus, $init);
+        $this->assertSame(3, $actual);
+    }
+
+    /** @test */
+    public function x()
+    {
+        $concat = fn($x, $y) => "$x$y";
+        $input = [1, 2, 3, 4, 5];
+        $init = "0";
+
+        // foldl: 012345
+        // foldr: 123450
+
+        $actual = array_reduce($input, $concat, $init);
+        $this->assertSame("012345", $actual);
+
+        $actual = foldr($input, $concat, $init);
+        $this->assertSame("123450", $actual);
+    }
+
+}

vendor/parsica-php/parsica/tests/Internal/PositionTest.php

@@ -0,0 +1,65 @@
+<?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\Internal;
+
+use PHPUnit\Framework\TestCase;
+use Parsica\Parsica\Internal\Position;
+use Parsica\Parsica\StringStream;
+use function Parsica\Parsica\char;
+
+final class PositionTest extends TestCase
+{
+    /** @test */
+    public function update()
+    {
+        $position = Position::initial();
+        $this->assertEquals(1, $position->line());
+        $this->assertEquals(1, $position->column());
+        $position = $position->advance("a");
+        $this->assertEquals(1, $position->line());
+        $this->assertEquals(2, $position->column());
+        $position = $position->advance("\n");
+        $this->assertEquals(2, $position->line());
+        $this->assertEquals(1, $position->column());
+        $position = $position->advance("\n\n\nabc");
+        $this->assertEquals(5, $position->line());
+        $this->assertEquals(4, $position->column());
+    }
+
+    /** @test */
+    public function position_in_sequence()
+    {
+        $parser = char('a')->followedBy(char('b'));
+        $input = new StringStream("abc", Position::initial());
+        $result = $parser->run($input);
+
+        $expectedColumn = 3;
+        $actualColumn = $result->remainder()->position()->column();
+        $this->assertEquals($expectedColumn, $actualColumn);
+    }
+
+    /** @test */
+    public function position_with_tabs()
+    {
+        $expected = 10;
+        // All of these move the column position to 10
+        $position = Position::initial()->advance("123456789");
+        $this->assertEquals($expected, $position->column());
+        $position = Position::initial()->advance("\t56789");
+        $this->assertEquals($expected, $position->column());
+        $position = Position::initial()->advance("\t\t9");
+        $this->assertEquals($expected, $position->column());
+        $position = Position::initial()->advance("1\t56789");
+        $this->assertEquals($expected, $position->column());
+        $position = Position::initial()->advance("123\t56789");
+        $this->assertEquals($expected, $position->column());
+    }
+}

vendor/parsica-php/parsica/tests/Internal/StringStreamTest.php

@@ -0,0 +1,52 @@
+<?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\Internal;
+
+use PHPUnit\Framework\TestCase;
+use Parsica\Parsica\Internal\Position;
+use Parsica\Parsica\StringStream;
+
+final class StringStreamTest extends TestCase
+{
+
+    /** @test */
+    public function take1()
+    {
+        $s = new StringStream("abc");
+        $t = $s->take1();
+        $this->assertEquals("a", $t->chunk());
+        $expectedPosition = new Position("<input>", 1, 2);
+        $expectedStream = new StringStream("bc", $expectedPosition);
+        $this->assertEquals($expectedStream, $t->stream());
+    }
+
+    /** @test */
+    public function takeN()
+    {
+        $s = new StringStream("abcde");
+        $t = $s->takeN(3);
+        $this->assertEquals("abc", $t->chunk());
+        $expectedPosition = new Position("<input>", 1, 4);
+        $expectedStream = new StringStream("de", $expectedPosition);
+        $this->assertEquals($expectedStream, $t->stream());
+    }
+
+    /** @test */
+    public function takeWhile()
+    {
+        $s = new StringStream("abc\nde");
+        $t = $s->takeWhile(fn($c) => $c !== "\n");
+        $this->assertEquals("abc", $t->chunk());
+        $expectedPosition = new Position("<input>", 1, 4);
+        $expectedStream = new StringStream("\nde", $expectedPosition);
+        $this->assertEquals($expectedStream, $t->stream());
+    }
+}