Relocate migration scripts to `drizzle/scripts`, update `start` and
`migrate`
to use the new path, and add a `generate` script for contributors.
Update README migration guidance for SQLite vs Postgres workflows.
BREAKING CHANGE: remove `migrate:force` and change migration script
paths; consumers relying on `scripts/migrate*.mjs` or `pnpm
migrate:force` must update to the new commands.
