Write and cleanup pdfs to cache dir

[andreasgriffin]

write pdfs to cache dir and cleanup on exit

Tested on

• Kubuntu
• Mint
• Mac
• Windows

Required

• pre-commit install before any commit. If pre-commit wasn't run for all commits, you can squash all commits git reset --soft $(git merge-base main HEAD) && git commit -m "squash" and ensure the squashed commit is properly formatted
• All commits must be signed. If some are not, you can squash all commits git reset --soft $(git merge-base main HEAD) && git commit -m "squash" and ensure the squashed commit is signed
• UI/Design/Menu changes were tested on macOS, because macOS creates endless problems. Optionally attach a screenshot.

Optional

• Update all translations
• Appropriate pytests were added
• Documentation is updated
• If this PR affects builds or install artifacts, set the Build-Relevant label to trigger build workflows