Feat: Add support for `python 3.13` and drop support for `python 3.8`#1612

Mr-Sunglasses wants to merge 5 commits intopypa:mainpypa/pipx:mainfrom

Mr-Sunglasses:feat/py-3.13-supportMr-Sunglasses/pipx:feat/py-3.13-supportCopy head branch name to clipboard