Add logic in booking to validate if the room is available

- now the `recurrence_rule` is only validating "RRULE:FREQ=WEEKLY;UNTIL=20110617T065959Z" in Google Calendar RFC 5545 format
- do research about this, and leverage and decide if we should allow adding other rule in the system in terms of ui and backend
- EXDATE = exceptions (remove dates)
- RDATE = additions (extra dates)
- add the validation in booking app to check if the room is available for the booking in the backend, and response 400 if not available
- need to add datetime filters in the booking and room app to give query params option for the corresponding frontend requests. the datetime filters should use with recurrence rules