Create trial period

[riderx]

make a route in backend (supabase ) to calculate trial period.
when user register,
show on the app he is on trial period of one month, as banner.
with in the title how much days he still have.
use the trial_at as the value to know that .
if the user start to paid make it disappear.

lastly add in the app the same ispaying feature like in the backend.
and when the trial is finish, lock user if he didn't upgrade