Tweaks to showing new version available

- Added frontend translation for english
- Moved frontend api logic to hook and backend api space
- Added swagger schema for the new api endpoint
- Moved backend logic to its own internal file
- Added user agent header to github api check
- Added cypress integration test for version check api
- Added a memory cache item from github check to avoid hitting it too
  much

frontend/src/hooks/index.ts

@@ -4,6 +4,7 @@ export * from "./useAuditLog";
 export * from "./useAuditLogs";
 export * from "./useCertificate";
 export * from "./useCertificates";
+export * from "./useCheckVersion";
 export * from "./useDeadHost";
 export * from "./useDeadHosts";
 export * from "./useDnsProviders";