Customizable zoom level on PdfWriter.add_named_destination()

[andersonhc]

Explanation

PdfWriter.add_named_destination() currently hardcodes the zoom mode to FitH (full width).
If a user wants to add a named destination with another zoom mode it's not possible.

Code Example

Adding a new parameter in add_named_destination(), defaulting to FitH would allow users to chose other values while being 100% backwards compatible.

Taking this code as an example: https://github.com/andersonhc/fpdf2-snippets/blob/main/create_table_of_contents/create_toc.py

We could use for full page zoom:

     writer.add_named_destination(destination_name, page_number=destination_page, type_fit= TypFitArguments.FIT)

[andersonhc]

This request originates from this discussion:
py-pdf/fpdf2#1603

If you are OK with the addition I can submit a PR.

[stefan6419846]

Thanks for the report. Sounds like something which we should support in pypdf, thus I am open to merging a corresponding PR.