- Remove WIP translation templates, moved to godot-editor-l10n which
will be the source and target for Weblate contributions.
* https://github.com/godotengine/godot-editor-l10n
- Re-add translations with a high completion ratio, stripped of the
untranslated and fuzzy strings, and of the location and translator
comments, to keep the size lower.
* Threshold editor interface: 20% complete.
* Threshold properties: 20% complete.
* Threshold classes: 10% complete.
