LibURL/Pattern: Add representation of a URL Pattern 'options' struct

These control how a pattern string is generated, which can vary for
different components and is also impacted by the 'ignoreCase' option
that can be provided in the URLPattern constructor.

Libraries/LibURL/Pattern/Options.cpp

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibURL/Pattern/Options.h>
+
+namespace URL::Pattern {
+
+// https://urlpattern.spec.whatwg.org/#default-options
+Options Options::default_()
+{
+    // The default options is an options struct with delimiter code point set to the empty string and prefix code point set to the empty string.
+    return {
+        .delimiter_code_point = {},
+        .prefix_code_point = {},
+    };
+}
+
+// https://urlpattern.spec.whatwg.org/#hostname-options
+Options Options::hostname()
+{
+    // The hostname options is an options struct with delimiter code point set "." and prefix code point set to the empty string.
+    return {
+        .delimiter_code_point = '.',
+        .prefix_code_point = {},
+    };
+}
+
+// https://urlpattern.spec.whatwg.org/#pathname-options
+Options Options::pathname()
+{
+    // The pathname options is an options struct with delimiter code point set "/" and prefix code point set to "/".
+    return {
+        .delimiter_code_point = '/',
+        .prefix_code_point = '/',
+    };
+}
+
+}