[Request]: Migration manager

[ospfranco]

What do you need?

The need to manage the scheme of sqlite database is quite clear. op-sqlite started just as a low -level layer to interact with sqlite but more and more people are using it as their main interface. I don't want to write an ORM, ORMs are just overhead for some convenience around objects (IMO) but there are quality of life features we can do that will just repeat in every project.

Migrations is one of this features. Writing your SQL by hand is fine, but keeping track of which migrations have been applied and applying them on app start is a low hanging fruit we can bake in into op-sqlite and solve the problem for everyone.