feat: add prefixed route

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

shared/lib/Routing/Attributes/AnonymousPrefixRoute.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace KTXF\Routing\Attributes;
+
+use Attribute;
+
+/**
+ * Marks a controller method as a prefix-matched anonymous route.
+ *
+ * Unlike AnonymousRoute (exact match), this attribute matches any request
+ * whose path *starts with* the given $path prefix, making it suitable for
+ * mounting sub-frameworks (e.g. sabre/dav) under a well-known URL tree.
+ *
+ * When $absolute is true the module prefix (/m/{handle}) is NOT prepended,
+ * so the route is registered exactly at $path from the root.
+ */
+#[Attribute(Attribute::TARGET_METHOD | Attribute::TARGET_CLASS)]
+class AnonymousPrefixRoute
+{
+    public function __construct(
+        public readonly string $path,
+        public readonly string $name,
+        public readonly array $methods = ['GET'],
+        public readonly bool $absolute = false,
+    ) {}
+}