Feature: Reserve slots currently being booked (#6909)

* Reserving slot picked up on cache

* change memory-cache to database table to block slots while reservation completes

* remove memory-cache

* update realeaseAt field when same user change te selected Slot

* Change default time to book

Co-authored-by: alannnc <alannnc@gmail.com>

* remove ip field and renews the session when the user remains in the booking form

* Remove duplicate router

* types fixes

* nit picks

* Update turbo.json

* Revert unrelated change

* Uses constant

* Constant already has a fallback

* Update slots.ts

* Unit test fixes

* slot reservation on user level and support seats

* types fixes and reserve slots on click

* Fix nit var name

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Co-authored-by: Efraín Rochín <roae.85@gmail.com>
Co-authored-by: zomars <zomars@me.com>
Co-authored-by: Peer Richelsen <peeroke@gmail.com>

.env.example

@@ -177,3 +177,5 @@ CSP_POLICY=
 
 # Vercel Edge Config
 EDGE_CONFIG=
+
+NEXT_PUBLIC_MINUTES_TO_BOOK=5 # Minutes