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/locale/lang/en.json

@@ -197,6 +197,7 @@
   "streams.tcp": "TCP",
   "streams.udp": "UDP",
   "test": "Test",
+  "update-available": "Update Available: {latestVersion}",
   "user": "User",
   "user.change-password": "Change Password",
   "user.confirm-password": "Confirm Password",

frontend/src/locale/src/en.json

@@ -593,6 +593,9 @@
 	"test": {
 		"defaultMessage": "Test"
 	},
+	"update-available": {
+		"defaultMessage": "Update Available: {latestVersion}"
+	},
 	"user": {
 		"defaultMessage": "User"
 	},