- Added migration package with core functionalities for managing database migrations.
- Created Migration struct to represent individual migrations with versioning.
- Implemented Registry to manage migrations and load them from a specified directory.
- Developed VersionTracker to handle migration records in the database.
- Introduced Migrator to apply and rollback migrations.
- Added utility functions for generating version timestamps and managing migration directories.
- Created tests for Migration, Migrator, VersionTracker, and overall migration functionality.
- Established a test database setup for running migration tests.