v2.0.6

feat(orm): add whereIsset method and findAllBy/findAllByPaginate

Add whereIsset method to ORM that conditionally applies WHERE clause only when value is not null or empty string. This simplifies common filtering patterns.

Add findAllBy and findAllByPaginate methods to Model as convenience aliases for existing functionality, improving API consistency and discoverability.

Update test files to verify new functionality works correctly.