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/league/uri-interfaces/IPv4/NativeCalculator.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * League.Uri (https://uri.thephpleague.com)
+ *
+ * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace League\Uri\IPv4;
+
+use function floor;
+use function intval;
+
+final class NativeCalculator implements Calculator
+{
+    public function baseConvert(mixed $value, int $base): int
+    {
+        return intval((string) $value, $base);
+    }
+
+    public function pow(mixed $value, int $exponent)
+    {
+        return $value ** $exponent;
+    }
+
+    public function compare(mixed $value1, mixed $value2): int
+    {
+        return $value1 <=> $value2;
+    }
+
+    public function multiply(mixed $value1, mixed $value2): int
+    {
+        return $value1 * $value2;
+    }
+
+    public function div(mixed $value, mixed $base): int
+    {
+        return (int) floor($value / $base);
+    }
+
+    public function mod(mixed $value, mixed $base): int
+    {
+        return $value % $base;
+    }
+
+    public function add(mixed $value1, mixed $value2): int
+    {
+        return $value1 + $value2;
+    }
+
+    public function sub(mixed $value1, mixed $value2): int
+    {
+        return $value1 - $value2;
+    }
+}