Migrate from own backend to Convex

[EasySouls]

For ease of development I decided we will use Convex for the database, and integrating it with Clerk, the authorization is really simple using one webhook which calls the database after signing in a new user with Clerk, so the data reflects automatically in the database.
Now I would like to update all the functions and screens using React Query calling the banckend to using Convex's hooks.