- Rename fields/methods for clarity:
  * dynamic_placeholder_button_hidden -> hide_placeholder_button
  * _compute_dynamic_placeholder_button_hidden -> _compute_hide_placeholder_button
- Restructure JS components:
  * Replace dynamic_placeholder_charfield_patch with new component-based implementation
  * Add proper prop handling and converter type awareness
- Add onchange handler to clear value when converter changes
- Refactor placeholder computation using dictionary mapping
- Update XML views with new field names and component parameters
- Improve mimetype.py documentation and default handling

Reuse odoo guess mimetype code and compatibility code between different versions of python-magic.

Also factorize some code and add comment.

- the file is correctly computed when fetched from redner
- the file name is standardized.

Renamed `find_field_with_sort_order` to `parse_sorted_field`.

- Updated the `find_field_with_sort_order` function to return
`(expression, None)` when the regex doesn't match.
- This provides clearer feedback by preserving the original expression.

Note that we implemented sorting functionality and added unit tests.

The changes include:

- Creation of a new utility file `utils/sorting.py` implementing sorting
functionalities such as :
`find_field_with_sort_order`,
`parse_fields_with_sort_directions`, and `sortkey`.
- Addition of a new file `tests/test_sorting.py` containing unit tests for
sorting logic.

& latest xcg/templates/odoo_module.

Render HTML to PDF with weasyprint:

- Use substitution variables in ir.actions.report model
- Send paperformat field info to rednerd when generating a new report PDF
- Refactoring code