i18n: Georgian (ka) interface language

Adds Georgian (ქართული, code ka) to Settings > General > Language, with
Match System for ka / ka-GE / ka_GE.UTF-8 locales:

- i18n.rs: the menu catalog, the same 628 (command, English label) keys as
  the other languages, plus the Undo/Redo entries, the workspace and 3D
  view shortcut submenus, the Reveal labels on Windows and Linux and the
  macOS Services items.
- i18n/ui.rs: GEORGIAN, every row of the Chinese panel catalogs (687), and
  GEORGIAN_PANELS, 195 rows for text the panels send through tr() that no
  catalog has yet (form dialogs, drop messages, screen-reader names,
  context menus, Project and Timeline column headers). The tests hold
  them to the same rules (unique, same placeholders, used by a converted
  panel) and keep them from shadowing a Chinese row; prefs_live.rs joins
  the converted files.
- i18n/effects.rs: Georgian names for all 307 effects and 21 categories;
  the CC series and brand names stay in English.
- Properties > Text Animation: the Add Animator and Presets buttons grow
  with their translated labels (English keeps 116 / 84 px).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YMTAbGNRxnMEzRvYnQGphF

crates/engine/src/prefs.rs

@@ -36,6 +36,7 @@ pub const LANGUAGES: &[(&str, &str)] = &[
     ("Français", "fr"),
     ("Deutsch", "de"),
     ("Čeština", "cs"),
+    ("ქართული", "ka"),
 ];
 
 /// Settings ▸ Startup & Repair ▸ Window Graphics: (label, `startup.windowGraphics` value).

crates/engine/src/tests_settings.rs

@@ -766,6 +766,12 @@ fn interface_language_is_validated_persisted_and_backward_compatible() {
     cs.load_settings();
     assert_eq!(cs.prefs.general.language, "cs");
     assert_eq!(Prefs::from_json(r#"{"general":{"language":"cs"}}"#).general.language, "cs");
+    // Georgian too.
+    assert!(crate::prefs::LANGUAGES.contains(&("ქართული", "ka")));
+    s.execute("prefs.set", json!({"key": "general.language", "value": "ka"})).unwrap();
+    let mut ka = Session { config: Some(store.clone()), ..Default::default() };
+    ka.load_settings();
+    assert_eq!(ka.prefs.general.language, "ka");
     s.execute("prefs.set", json!({"key": "general.language", "value": "ja"})).unwrap();
     let mut reloaded = Session { config: Some(store), ..Default::default() };
     reloaded.load_settings();