Keep in mind that I do not have any considerable TypeScript experience and that this PR was not tested and made through "educated guesses" by using documentation, the Action itself, as well as and sample Actions provided by GitHub as a point of reference, as I currently do not have the necessary technical means to do so for ~2 weeks (and I would probably forget about making this PR later :D).

If you do not wish to review a PR that is not tested, feel free to set it as a WIP (and I'm sending my apologies in advance!) - I did not do so because I am hoping that there is not that much of a room for error.

The code looks good to me but I'm also unsure how to go about testing a GitHub Action like this.

The code looks good to me but I'm also unsure how to go about testing a GitHub Action like this.

That's best done using a testing repository.