restructure sql modules to have flat imports

[tim-smart]

No description provided.

[changeset-bot]

🦋 Changeset detected

Latest commit: 2375fce

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@effect/sql-sqlite-react-native	Major
@effect/sql-sqlite-node	Major
@effect/sql-sqlite-wasm	Major
@effect/sql-sqlite-bun	Major
@effect/sql-drizzle	Major
@effect/sql-mysql2	Major
@effect/sql-mssql	Major
@effect/sql-pg	Major
@effect/sql	Minor
@effect/cluster-workflow	Patch
@effect/cluster	Major

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