feat(tests): add comprehensive tests for SQLite column definitions

- Introduced a new test suite for `getColumnDefForSchema`, covering various schema types including basic types, refinements, literal types, transformations, complex types, and edge cases.
- Enhanced test coverage for nested schemas, custom schemas, and annotations, ensuring accurate mapping to SQLite column definitions.
- This addition improves the reliability of the SQLite schema validation and enhances developer confidence in the schema handling logic.

Author: schickling