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/Contracts/HostInterface.php

@@ -0,0 +1,59 @@
+<?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\Contracts;
+
+/**
+ * @method string|null encoded() returns RFC3986 encoded host
+ */
+interface HostInterface extends UriComponentInterface
+{
+    /**
+     * Returns the ascii representation.
+     */
+    public function toAscii(): ?string;
+
+    /**
+     * Returns the unicode representation.
+     */
+    public function toUnicode(): ?string;
+
+    /**
+     * Returns the IP version.
+     *
+     * If the host is a not an IP this method will return null
+     */
+    public function getIpVersion(): ?string;
+
+    /**
+     * Returns the IP component If the Host is an IP address.
+     *
+     * If the host is a not an IP this method will return null
+     */
+    public function getIp(): ?string;
+
+    /**
+     * Tells whether the host is a domain name.
+     */
+    public function isDomain(): bool;
+
+    /**
+     * Tells whether the host is an IP Address.
+     */
+    public function isIp(): bool;
+
+    /**
+     * Tells whether the host is a registered name.
+     */
+    public function isRegisteredName(): bool;
+}