Warning message on mobile

[kingalg]

• Adding a warning message on Join Community and Create Community views as per Feature request: Warn people that this is insecure on first run #2588
  (Some modifications will be made in how it looks, as it was initially created for a different view, but it conveys the message for now.)
• To run Xcode, I had to change the version of one of the PODS: CocoaLumberjack (3.9.0) to CocoaLumberjack (3.9.1) - checked with Isla, and it should be good.
• Snapshot tests for both views are updated.

Pull Request Checklist

• I have linked this PR to a related GitHub issue.
• I have added a description of the change (and Github issue number, if any) to the root CHANGELOG.md.

(Optional) Mobile checklist

Please ensure you completed the following checks if you did any changes to the mobile package:

• I have run e2e tests for mobile
• I have updated base screenshots for visual regression tests