Refactoring

See merge request !2

resolve #6

fix(smartlearn): Ensure 'position' attribute in JSON follows sequential positive values

See merge request !1

- Updated JSON generation logic to set the 'position' attribute to sequential positive values, starting from 1, ensuring compatibility with Smartlearn's requirements.
- Added automated validation tests to verify 'position' values are positive and sequential across JSON blocks.
- Implemented negative tests to confirm 'position' does not contain invalid values (0 or negative).

This update resolves Issue #2 by enforcing the correct usage of 'position' in the Smartlearn format, facilitating expected output generation.