Allow virtual term input in raw mode

[Vap0r1ze]

This PR adds support for virtual terminal input (e.g: \x1b[B for DownArrow) when reading from stdin in raw mode.
It does this by moving from crossterm to a (smaller) crate specifically for cross-platform tty raw mode. It works almost exactly like crossterm, but also uses the virtual terminal mode flag.

This also fixes a small bug with the uiua watch-runner where raw mode does not get disabled after the program exits, because disable_raw_mode() only worked after enable_raw_mode() was called at least once, which the main process never does, only the child process (even though they share the same stdio).

Motivation: I wanted to be handle arrow keys so I could make Tetris :^)

[Vap0r1ze]

One possibly weird behaviour about the current state of this PR is that raw mode causes Ctrl+C to be passed down to the uiua program rather than being caught by the main process. Let me know if this is desired or if I should change this in some way because it can be annoying

[kaikalii]

This is the current behavior, so I think it's fine.

[kaikalii]

Thanks!