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

My build of nnn with minor changes

Arun Prakash Jana ed616cf746 Minor refactor		pirms 5 gadiem
..
.clang-tidy	Refactor plugin handling	pirms 5 gadiem
dbg.h	Use : for filter case	pirms 5 gadiem
nnn.c	Minor refactor	pirms 5 gadiem
nnn.h	Fix #446	pirms 5 gadiem