* added functions
added:
- get_cursor_position()
- set_terminal_title(title string)
* implement term.get_cursor_position and term.set_terminal_title on unix
* Cleanup
* make x,y fields of term.Coord mutable
* fix vrepl compilation
* use more descriptive var names in term_test.v
* do not change the current terminal title in dumb terminals; do not test term.set_terminal_title outside of CI
* unix: in term.set_terminal_title, return true even for dumb terminals
Co-authored-by: Brent Pryer <brent@pryermachine.com>
Co-authored-by: Delyan Angelov <delian66@gmail.com>
