Added post limit warning (#26793)

* Renamed user limit API to app limit API

* Added post warning limit

* Added tests

* Fixed types

* Renamed AppLimits to ServerLimits

* Fixed tests and review fixes

* Updated generated code

* Updated server i18n

* Fixed TestCreateUserOrGuest test

* Exclude deleted posts from post count for liims

* Reduced limits for ease of testing

* Restored original limts

server/i18n/en.json

@@ -6039,9 +6039,13 @@
     "translation": "No license present"
   },
   {
-    "id": "app.limits.get_user_limits.user_count.store_error",
+    "id": "app.limits.get_app_limits.user_count.store_error",
     "translation": "Failed to get user count"
   },
+  {
+    "id": "app.limits.get_server_limits.post_count.store_error",
+    "translation": "Failed to get post count"
+  },
   {
     "id": "app.login.doLogin.updateLastLogin.error",
     "translation": "Could not update last login timestamp"