Booking confirm endpoint refactoring (#2949)
* Adds new default handler and responder
* Moved confirm endpoint
* Fixes availability for unconfirmed bookings
* Cleanup
* Update _patch.ts
* Prevent too much diffs
* Adds missing BookingStatus
* Migrates confirmed & rejected to status
* Adds requiresConfirmation icon to listing
* Adds booking status migration
* Adds migrations to remove confirmed/rejected
* Undo refactor
* Sets the organizer as "accepted" in gCal
* Update getBusyTimes.ts
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>
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