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

My build of nnn with minor changes

Arun Prakash Jana fe80d5aa9d Update key collision detection		pirms 5 gadiem
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.clang-tidy	Increase function length	pirms 5 gadiem
dbg.h	nnn as file manager: more changes	pirms 6 gadiem
nnn.c	Update key collision detection	pirms 5 gadiem
nnn.h	Implemented edit selection buffer (#345)	pirms 5 gadiem