feat(i18n): add Hungarian translation (hu) (#1236)

Integrate the community-contributed Hungarian translation by
Tibor Hermann (@htibcsike) as the 19th locale:

- add apps/web/src/assets/i18n/hu.json (1,142 of 1,175 keys translated;
  32 keys added after the contribution fall back to English, plus the
  new LANGUAGES.HUNGARIAN endonym)
- register HUNGARIAN = 'hu' in the Language enum, SUPPORTED_LANGS,
  Angular date locale registration, and the TMDB language map (hu-HU)
- add LANGUAGES.HUNGARIAN = "Magyar" to en.json and all other locales
  via tools/i18n/fill-missing.mjs
- update README.md and CLAUDE.md language counts to 19

Closes #1192, refs #1140.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

libs/services/src/lib/tmdb/tmdb-config.ts

@@ -49,6 +49,7 @@ const TMDB_LANGUAGE_MAP: Record<Language, string> = {
     [Language.POLISH]: 'pl-PL',
     [Language.PORTUGUESE]: 'pt-PT',
     [Language.GREEK]: 'el-GR',
+    [Language.HUNGARIAN]: 'hu-HU',
 };
 
 export function toTmdbLanguage(

libs/shared/interfaces/src/lib/language.enum.ts

@@ -20,4 +20,5 @@ export enum Language {
     POLISH = 'pl',
     PORTUGUESE = 'pt',
     GREEK = 'el',
+    HUNGARIAN = 'hu',
 }