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.		pirms 6 gadiem
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.clang-tidy	Move clang-tidy config	pirms 6 gadiem
dbg.h	nnn as file manager: more changes	pirms 6 gadiem
nnn.c	documentation on rl_change_environment	pirms 6 gadiem
nnn.h	Add F2 for rename (undocumented)	pirms 6 gadiem