Immanuel/nnn: My build of nnn with minor changes - nnn

My build of nnn with minor changes

0xACE 02fd4c4d8c documentation on rl_change_environment Basically that line lets nnn retain the WINCH signal for itself.		6 lat temu
..
.clang-tidy	Move clang-tidy config	6 lat temu
dbg.h	nnn as file manager: more changes	6 lat temu
nnn.c	documentation on rl_change_environment	6 lat temu
nnn.h	Add F2 for rename (undocumented)	6 lat temu