feat(i18n): add French (fr-FR) locale support (#3126)

* feat(i18n): add French (fr) locale translations

* fix translation key mismatch for 'Models: Qwen latest models'

fix translation key mismatch for 'Models: Qwen latest models'

Add missing trailing \n to the English lookup key so the French
translation is correctly matched by the i18n system.

Suggested by @wenshao in code review.

Co-authored-by: Shaojin Wen <shaojin.wensj@alibaba-inc.com>

* fix(i18n): fix translation key mismatch for 'Models: Qwen latest models'

* fix(schema): add fr to settings.schema.json language enum

* fix(i18n): remove duplicate key 'Models: Qwen latest models' in fr.js

---------

Co-authored-by: Shaojin Wen <shaojin.wensj@alibaba-inc.com>

packages/cli/src/i18n/languages.ts

@@ -11,6 +11,7 @@ export type SupportedLanguage =
   | 'de'
   | 'ja'
   | 'pt'
+  | 'fr'
   | string;
 
 export interface LanguageDefinition {
@@ -61,6 +62,12 @@ export const SUPPORTED_LANGUAGES: readonly LanguageDefinition[] = [
     fullName: 'Portuguese',
     nativeName: 'Português',
   },
+  {
+    code: 'fr',
+    id: 'fr-FR',
+    fullName: 'French',
+    nativeName: 'Français',
+  },
 ];
 
 /**