AK+Meta: Add SwiftAK module to add helpers to construct swift Strings

This allows constructing Foundation.Data and Swift.String without
unnecessary copies from AK.StringView and AK.String respectively.

AK/AK+Swift.swift

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+import AK
+import Foundation
+
+public extension Foundation.Data {
+    init(_ string: AK.StringView) {
+        let bytes = string.bytes()
+        self.init(bytesNoCopy: UnsafeMutableRawPointer(mutating: bytes.data()), count: bytes.size(), deallocator: .none)
+    }
+}
+
+public extension Swift.String {
+    init?(_ string: AK.String) {
+        self.init(data: Foundation.Data(string.__bytes_as_string_viewUnsafe()), encoding: .utf8)
+    }
+
+    init?(_ string: AK.StringView) {
+        self.init(data: Foundation.Data(string), encoding: .utf8)
+    }
+}

AK/CMakeLists.txt

@@ -68,4 +68,8 @@ if (ENABLE_SWIFT)
         "${CMAKE_CURRENT_BINARY_DIR}/Backtrace.h"
         "${CMAKE_CURRENT_BINARY_DIR}/Debug.h"
     )
+
+    target_compile_features(AK PUBLIC cxx_std_23)
+    set_target_properties(AK PROPERTIES Swift_MODULE_NAME SwiftAK)
+    target_sources(AK PRIVATE AK+Swift.swift)
 endif()