add support for \r escapes

\r is replaced with a space

Use term.setCursorPos(1, select(2, term.getCursorPos())) to return the cursor to the start of the line. CraftOS has very limited escape code support, only implementing newlines for basic multiline support - it doesn't care about any of the rest of ANSI/VT-100 escapes. If you need them, write your own function to implement those on top of your own system.

_{Phoenix supports ANSI escapes!}