feat: add French translation, including latest fields (#837)

I added a translation file for French and updated fields in other
languages to support French.

Author: lucbocahut

public/locales/en-US/translations.json

@@ -455,6 +455,7 @@
   "peer_crawled_context": "For more context, see https://xrpl.org/peer-crawler.html",
   "xchainbridge": "XChainBridge",
   "language_en-US": "English",
+  "language_fr-FR": "French",
   "language_ja-JP": "Japanese",
   "language_ko-KR": "Korean",
   "language_es-ES": "Spanish",
@@ -485,4 +486,4 @@
   "namespace": "Namespace",
   "api_version": "API Version",
   "triggered_on": "Triggered On"
-}
+}