I made it mostly for myself but wanted to share it here as it could be fun for other people too. Again never done any custom content for this game before, just played it from time to time, so I probably forgot some things so any feedback is welcome. Although I have a bunch of other things going on in my life and doing this for fun so don't expect very quick or consistent updates.
Note: to enable save deletion you have to use a custom save_dir in the options, I made it this way as a safety measure to not delete my normal saves
Link: https://gitea.com/ClonedPuffin/doom-gameplay-lives