v1.5rtest_unstb/20230711

This is a close-major change., dated 11/Jul/2023.

What's new there:

• Added uname into \system\base, new system command
• SETUP.bat renamed to SHELL.bat, altering the prompt (now with shitty//™ prompt for nothing better)
• minor fixes (no actual improvement recorded)

Known issue(s):

• ...still no mouse driver yet. I may implement this in some next updates. Or not.
• Unarranged screen-filling outputs may make you confused.

That's all. No idea about the next update.