The SDL3 Documentation Megathread

Ok, so one thing we'd like to do as SDL3 is getting closer is improve documentation.

Documentation is a never-ending job: it will never be complete and it can always improve, so we should probably decide on things we definitely want to do as specific tasks we can finish. Maybe we choose new tasks later, but let's have something we can list in a milestone.

This thread is open to conversation! I'll edit this text with a checklist when we make some decisions.