Is your feature request related to a problem? Please describe.
I want to apply my migrations to an in-memory sqlite db and then generate the go-jet structures using that. However, right now it's not possible as GenerateDSN takes a connection string instead of an existing DB connection. My workaround is to write the DB to a temporary file and use that. I am aware that I can make the DB global in-memory to the process and then connect to it. However, this ruins isolation from other DBs in the process.

I also use alternative sqlite implementations like "modernc.org/sqlite" which are registered as "sqlite" instead of "sqlite3" which the GenerateDSN expects so I have to reregister the driver I want as "sqlite3" before calling the generator.

Describe the solution you'd like

Add the following function that behaves the same as GenerateDSN except it applies directly to the supplied *sql.DB.

func GenerateDB(db *sql.DB, destDir string, templates ...template.Template) error