feat(i18n): add Hindi translations for contact-facing pages

- Add hi.json locale file with Hindi translations
- Add Hindi language to SUPPORTED_LANGUAGES
- Import Hindi translations in i18n index

Closes #246

packages/shared/src/i18n/index.ts

@@ -3,7 +3,7 @@ import type {Language} from './languages.js';
 import enTranslations from './locales/en.json' with {type: 'json'};
 import nlTranslations from './locales/nl.json' with {type: 'json'};
 import frTranslations from './locales/fr.json' with {type: 'json'};
-
+import hiTranslations from './locales/hi.json' with {type: 'json'};
 export {
   SUPPORTED_LANGUAGES,
   DEFAULT_LANGUAGE,
@@ -31,6 +31,7 @@ const translationsMap: Record<string, Translations> = {
   en: enTranslations,
   nl: nlTranslations,
   fr: frTranslations,
+  hi: hiTranslations,
 };
 
 // In-memory cache for loaded translations