Rewrote the changelog script to use primarily merged pull requests
between "commit A" and "commit B".
It uses the GitHub rest api. The resulting data is pushed to a draft gist.
Manual usage is in the README.
Also adds a GitHub workflow action to run the tool on demand, through
the GitHub action's interface.
- Add a script to generate achievement data from Steamworks API
- Add achievements page with a link in sidebar
- Calculate achievements (1/min) with an engine counter
- Store achievements with a timestamp on unlocked in the PlayerObject
- Add a script to generate monochrome icons from Steam icons
- Add toast when unlocking an achievement
