feat: migrate to github.com/jackc/pgx/v5

[joschi]

Migrate from database/sql and github.com/jmoiron/sqlx to github.com/jackc/pgx/v5.

If I understood a94b201 correctly, you were planning to do this anyway.

If you don't want to use this change, I'm happy to only use it in a fork of this project.

Let me know what you think.

[prochac]

The rewrite doesn't have consensus :D
One option is to support, and test all drivers.
And also provide support for non-std lib pgx interface through interface+adapter.

The second option is to go fully pgx, since it's the no.1 Postgres driver, and this project is, and ever will be Postgres-only.

I guess we could decide next week what path we want to go. And if I remember correctly, the full-pgx is the popular.
But we wanted to prepare all possible breaking changes, so we serve them all at once.

[prochac]

Ok, so we agreed to go with pgx. (And I can try to add stdlib support later)

Before merge, let me try it from a branch.