LibWeb: Add start of HTML Tokenizer in Swift

Currently it's just a Token class.

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -794,4 +794,31 @@ if (ENABLE_SWIFT)
     list(APPEND LIBWEB_ALL_GENERATED_HEADERS ${generated_headers})
 
     generate_clang_module_map(LibWeb GENERATED_FILES ${LIBWEB_ALL_GENERATED_HEADERS})
+
+    target_compile_features(LibWeb PUBLIC cxx_std_23)
+
+    target_sources(LibWeb PRIVATE
+        HTML/Parser/HTMLToken.swift
+    )
+    target_compile_definitions(LibWeb PRIVATE LIBWEB_USE_SWIFT)
+    set_target_properties(LibWeb PROPERTIES Swift_MODULE_NAME "SwiftLibWeb")
+
+    # FIXME: These should be pulled automatically from interface compile options for the target
+    set(VFS_OVERLAY_OPTIONS
+        -Xcc -ivfsoverlay${CMAKE_CURRENT_BINARY_DIR}/vfs_overlay.yaml
+        -Xcc -ivfsoverlay${CMAKE_CURRENT_BINARY_DIR}/../LibGfx/vfs_overlay.yaml
+        -Xcc -ivfsoverlay${Lagom_BINARY_DIR}/AK/vfs_overlay.yaml
+    )
+    get_target_property(LIBWEB_NATIVE_DIRS LibWeb INCLUDE_DIRECTORIES)
+    _swift_generate_cxx_header(LibWeb "LibWeb-Swift.h"
+        SEARCH_PATHS ${LIBWEB_NATIVE_DIRS}
+        COMPILE_OPTIONS ${VFS_OVERLAY_OPTIONS}
+    )
+
+    # FIXME: https://gitlab.kitware.com/cmake/cmake/-/issues/26175
+    if (APPLE)
+        add_custom_command(TARGET LibWeb POST_BUILD
+            COMMAND install_name_tool -id @rpath/liblagom-web.0.dylib "$<TARGET_FILE:LibWeb>"
+        )
+    endif()
 endif()