Upstream API changes to Godot

[RedMser]

Applied in fork

• ResourceFormatLoader for Translation on startup Move translations initialization to be later godotengine/godot#91374
• Translate "args" parameter

Not yet implemented

• Backwards compatibility methods for the "args" parameter.
• ScriptEditor::open_file only checks for Script and JSON resources to determine what it can open
  • TODO: should check if this is also what determines if double-clicking a file in FileSystem dock opens the script editor

[RedMser]

Once Godot supports loading Fluent translations on startup, it might not be worth maintaining an engine fork just for the alternative translate syntax. This would simplify the UX for interested users.

Not sure about the best ergonomics for the "vanilla" args syntax yet. Would something like "message" + str({ ... }) be good enough?