feat(i18n): add i18n on server side

- remove the hardcoded list of locales in favor of a discovry on start time
    - server will stop on badly formatted locale .json
    - add server.* entries for serer side translation

    server side translation will be used for templating and email
    note: no json in some embded html (like in /magic), amount of work was similar

src/application/services/i18n_application_service.rs

@@ -23,8 +23,9 @@ impl I18nApplicationService {
 
     /// Get a translation for a key and locale
     pub async fn translate(&self, key: &str, locale: Option<Locale>) -> I18nResult<String> {
-        let locale = locale.unwrap_or_default();
-        self.i18n_service.translate(key, locale).await
+        self.i18n_service
+            .translate(key, locale.unwrap_or_default())
+            .await
     }
 
     /// Load translations for a locale
@@ -38,7 +39,7 @@ impl I18nApplicationService {
         let mut results = Vec::new();
 
         for locale in locales {
-            let result = self.i18n_service.load_translations(locale).await;
+            let result = self.i18n_service.load_translations(locale.clone()).await;
             results.push((locale, result));
         }