- Added controllers for handling friendly match invitations and shared matches.
- Created migration scripts for `friendly_match_invitation` and `friendly_match_shared` tables.
- Developed models for `FriendlyMatchInvitation` and `FriendlyMatchShared`.
- Established routes for managing invitations and shared matches.
- Implemented services for business logic related to invitations and shared matches.
- Documented the concept plan for the new feature including API endpoints and data models.