Storage - Replace LiteDB with SQLite + EF Core

[RobertBeekman]

• Remove branch from CI

[DarthAffe]

Two things I noted:

1. The context in EF Core is not designed to be stored and kept alive for the lifetime of the application, but to be created when needed and disposed afterwards (https://learn.microsoft.com/en-us/ef/core/dbcontext-configuration/#the-dbcontext-lifetime)
2. You should run #pragma OPTIMIZE from time to time (I don't think it's necessary on each db close, but maybe on application start/exit (https://www.sqlite.org/pragma.html#pragma_optimize and https://www.sqlite.org/lang_analyze.html)