In this commit, several improvements and fixes have been implemented in the 'selfconsumptions' model:

1. Typo correction in code comments for improved clarity.

2. Added explanatory comments to enhance code documentation and understanding.

3. Refactored the codebase to follow the DRY (Don't Repeat Yourself) principle, reducing redundancy and improving maintainability.

4. Eliminated the wizard to initiate the download immediately upon button press, providing a more streamlined user experience.

5. Changed the name of the custom paper format for consistency and clarity.