Print all TeX Live settings in JSON format

TeX Live settings manager.
More information: <https://www.tug.org/texlive/tlmgr.html>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

tlmgr option showall --json

click the source code to copy install tlmgr option on any operating system with command-not-found.com