LibWeb: Generate ValueID-to-enum conversion functions

Author: https://github.com/AtkinsSJ
Commit: 3f61f869c8
Pull-request: https://github.com/SerenityOS/serenity/pull/13673

Meta/Lagom/Tools/CodeGenerators/LibWeb/GeneratorUtil.h

@@ -49,6 +49,11 @@ String camel_casify(StringView dashy_name)
     return builder.to_string();
 }
 
+String snake_casify(String const& dashy_name)
+{
+    return dashy_name.replace("-", "_", true);
+}
+
 ErrorOr<JsonValue> read_entire_file_as_json(StringView filename)
 {
     auto file = TRY(Core::Stream::File::open(filename, Core::Stream::OpenMode::Read));