Found a bunch of terminal cleanup gaps

Most of them are Windows or cmd.exe specific (nothing ever works on Windows), but some are present on POSIX too. The Windows specific ones are:

• cmd.exe for some unknown reason doesn’t turn off the raw input sequences, so arrow keys don’t work like they should, even though I explicitly turn it off (????????) (I hate Windows, they always have to do something unexplainable for no reason just so your code doesn’t work as it should)

• when you terminate the program with ctrl+c or ctrl+break while actively dragging the model around, it sometimes leaks mouse escape sequences into the next prompt

• bunch of other weird small stuff that nobody cares about

And the few on POSIX are mostly ctrl+z suspend/resume behaviour not recovering the terminal and the same thing with ctrl+\ (SIGQUIT).

I’m still working on fixing these. Most of the windows ones are already fixed, but I haven’t even started with the linux/POSIX ones.

I have postponed the planned release to when I fix these + any other issues I find.