This commit provides a generalized solution to ensure editor settings are
properly initialized and available in both module and GDExtension versions.
While #204 fixed the specific issue with 'limbo_ai/editor/layout', this change
aims to prevent similar problems for all editor settings.
In particular, `limbo_ai/editor/prefer_online_documentation` was also not
available.
Changes:
- Updated EDITOR_DEF macro to handle both module and GDExtension cases
- Remove special case for `limbo_ai/editor/layout` in
LimboAiEditorPlugin from earlier fix.