v1.5rtest_unstb/20231222

A quick version relabelling. I looked at my repo again and realised that I need to leave a quick last update for 2023.

What's new there:

• no actual improvement recorded
• no new changes

Known issues:

• ...still no mouse driver yet.
• no GUI lol
• compatibility is very far from usable
• text mode reliant
• hard disc support not evaluated
• not a serious project
  and probably more...

I will not count for next release dates again.