Generate db documentation from migrations instead of connection to an actual db

[fira42073]

From a user perspective, it would be great if I didn't have to spin up a database instance and apply migration to it in order to generate docs.

I think sqlc is doing a similar thing, perhaps it might be a good idea to somehow reuse this approach, or perhaps even the codebase.
https://github.com/sqlc-dev/sqlc/blob/main/internal/sql/catalog/schema.go

I see that this code is under internal/ , and reusing it is not really viable, but perhaps there is another possibility to evaluate the state of the database by looking just at migrations.