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

My build of nnn with minor changes

Nexie Kind 815d8fb21c Fix zsh path autocompletion (#88 )		7 lat temu
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auto-completion	Fix zsh path autocompletion (#88)	7 lat temu
copier	Support multiple file path copy	7 lat temu
quitcd	Improved portability on MacOS (#86)	7 lat temu
test	Fix #50: revert to -O2 optimization	7 lat temu