MacOS quicklook for unknown text files (qlstephen), code (qmcolorcode), markdown (qlmarkdown), etc
brew install qlcolorcode qlstephen qlmarkdown quicklook-json qlimagesize suspicious-package apparency quicklookase qlvideo
xattr -d -r com.apple.quarantine ~/Library/QuickLook
qlmanage -r
killall Finder