#3362 docs: Move SQL tap, target and stream docs to reflect their location in the package Pull request opened by edgarrmondragon ## Summary by Sourcery Reorganize the SQL connector API and documentation under a new singer_sdk.sql namespace, while preserving backward compatibility via dynamic imports and deprecation warnings. Enhancements: • Implement getattr in singer_sdk.connectors.sql to proxy moved SQL classes with deprecation warnings Documentation: • Relocate SQL connector, tap, target, stream and sink documentation to reflect their new paths under singer_sdk.sql and update all references Tests: • Move SQL typing and connector tests into tests/sql and update imports to singer_sdk.sql Chores: • Update import paths in code, fixtures, and example packages (tap-sqlite, target-sqlite) to use singer_sdk.sql instead of singer_sdk.connectors.sql meltano/sdk