20240504:
+ first release





TODO:
- u:\ram\p2sm.log
- history of actions for drawing and blocks handling and ^Z/Undo function
- primitives: (filled) square and ellipse, lines, filler, text...
- BubbleGEM
? color gradient in palette manipulator?
? manual color remap?
? ROR/ROL index+palette when increasing bitplane number?
? save images list as project?
? layers? (suggestion by _Dbug_)
? save a copy to scrap.img?
- ...