Add slog support to goose provider

[mfridman]

This PR enable callers to pass a *slog.Logger logger to goose provider. Example:

logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
_, err = goose.NewProvider(goose.DialectSQLite3, db, fsys,
	goose.WithLogger(logger),
)

And internally goose will invoke the structured logger:

logger.Info("applied migration",
	slog.String("source", filepath.Base(m.Source)),
	slog.Any("direction", direction),
	slog.Any("duration", result.Duration),
	slog.Bool("empty", result.Empty),
)

By default if WithVerbose(true) is enabled but no logger is supplied, goose will use an internal text logger:

time="2024-10-14 13:07:30" level=INFO msg="applied migration" logger=goose source=00001_users_table.sql direction=up duration=1.174375ms empty=false

An alternative implementation is to using the existing goose.Logger interface, but I worry this may corner goose into a corner.

[mfridman]

Closing for now. #833 (comment)