chore: App router migration - Add method to `BookingRepository` & Extract `/videos/**/*` into `/modules` and `/lib` (#16466)

* meeting-ended: refactor and extract client code into /modules

* meeting-not-started: refactor and extract client code into /modules

* meeting-not-found: fix getData

* BookingRepository: add a new method

* video: refactor and extract client code into /modules

* refactor

* refactor getServerSideProps

* use findBookingByUid for more getServerSideProps functions

* rename findBookingByUid -> findBookingByUidWithOptionalSelect

* add safety