feat(spam-moderation): implement spam detection and moderation for team invitations and signups

- Integrated SpamDetector utility to check for spam patterns in team names and user names during signup and invitation processes.
- Enhanced TeamMembersController to log and block obvious spam invitations while allowing suspicious ones for review.
- Updated passport-local-signup strategy to flag high-risk signups and log details for admin review.
- Added moderation routes to handle spam-related actions and integrated rate limiting for invitation requests.
- Improved frontend components to provide real-time spam warnings during organization name input, enhancing user feedback.

worklenz-frontend/.gitignore

@@ -11,6 +11,7 @@
 # production
 /build
 /public/tinymce
+/docs
 
 # misc
 .DS_Store