Applications/util/less.c: Added a cut-down less(1) pager.

[DoctorWkt]

This is a start at a less(1) pager for FUZIX. It works but could do with a few improvements.

[EtchedPixels]

Fuzix console defaults are vt52 so hardcoding vt100 isn't going to work well. Should probably use libtermcap or for size savings look how the other apps use tchelp (eg vile)

[DoctorWkt]

I've added code to switch to the VT52 escape sequences if TERM=vt52. This works as far as I can tell (using xterm in VT52 mode).

Weirdly, I made a different modification which used tgetent() and tgetstr() to get the actual escape sequences from /etc/termcap. I backed it out as it crashed the kernel when running the 68knano emulator.

[EtchedPixels]

Do you still have the tgetent/tgetstr one anywhere so I can debug the kernel ?