[client/ui] Introduce localisation (i18n + preferences) feature packages

Adds a tray + React translation pipeline driven by a single JSON locale
tree (frontend/src/i18n/locales) embedded into the Go binary. The tray
re-renders on language switch via a Localizer that subscribes to the
preferences store.

Layout:
- client/ui/i18n: Bundle, LanguageCode, Language, errors, embedded-FS
  loader. Pure domain, no Wails/daemon deps.
- client/ui/preferences: Store + UIPreferences for user-scope UI state,
  persisted under os.UserConfigDir()/netbird/ui-preferences.json with
  atomic writes and a subscribe/broadcast channel.
- client/ui/services: thin Wails-binding facades (services.I18n,
  services.Preferences) so React sees ctx-first signatures.
- client/ui/localizer.go: tray bridge that owns the active language,
  exposes T()/StatusLabel() and re-paints the menu on prefs change.
- tray.go: every user-facing const replaced by translation keys via
  t.loc.T(...); menu rebuild + state replay on language switch.
- main.go: //go:embed all:frontend/src/i18n/locales, wires Bundle ->
  Store -> Localizer -> Wails facades in order.

Frontend API exposed via Wails bindings: I18n.Languages, I18n.Bundle,
Preferences.Get, Preferences.SetLanguage, plus the
netbird:preferences:changed event.

Includes regenerated Wails TS bindings (peers/profileswitcher/etc.
re-emitted as part of the build) and en/hu seed bundles.

client/ui/frontend/bindings/github.com/wailsapp/wails/v3/internal/eventcreate.ts

@@ -13,16 +13,18 @@ import * as services$0 from "../../../../netbirdio/netbird/client/ui/services/mo
 function configure() {
     Object.freeze(Object.assign($Create.Events, {
         "netbird:event": $$createType0,
-        "netbird:status": $$createType1,
-        "netbird:update:available": $$createType2,
-        "netbird:update:progress": $$createType3,
+        "netbird:preferences:changed": $$createType1,
+        "netbird:status": $$createType2,
+        "netbird:update:available": $$createType3,
+        "netbird:update:progress": $$createType4,
     }));
 }
 
 // Private type creation functions
 const $$createType0 = services$0.SystemEvent.createFrom;
-const $$createType1 = services$0.Status.createFrom;
-const $$createType2 = services$0.UpdateAvailable.createFrom;
-const $$createType3 = services$0.UpdateProgress.createFrom;
+const $$createType1 = services$0.UIPreferences.createFrom;
+const $$createType2 = services$0.Status.createFrom;
+const $$createType3 = services$0.UpdateAvailable.createFrom;
+const $$createType4 = services$0.UpdateProgress.createFrom;
 
 configure();

client/ui/frontend/bindings/github.com/wailsapp/wails/v3/internal/eventdata.d.ts

@@ -13,6 +13,7 @@ declare module "@wailsio/runtime" {
     namespace Events {
         interface CustomEvents {
             "netbird:event": services$0.SystemEvent;
+            "netbird:preferences:changed": services$0.UIPreferences;
             "netbird:status": services$0.Status;
             "netbird:update:available": services$0.UpdateAvailable;
             "netbird:update:progress": services$0.UpdateProgress;