zet: new package

[flosnvjx]

No description provided.

[TomJo2000]

• Review mostly copied from addpkg(main/partialzip): 5.0.0 #23670

I can't seem to find a package request for this project.
So I'll just go through an abbreviated version of the package request checklist below really quick.

Packaging policy acknowledgement

• The project is actively developed.
• The project has existing packages and is "well known".
• Licensed under an open source license.
• Not available through a language package manager: pip, npm, cpan, cargo, etc.
• Not taking up too much disk space (< 100MiB per architecture, exceptions can be made)
• Not duplicating the functionality of existing packages.
• Not serving hacking, malware, phishing, spamming, spying, ddos functionality.
• I certify that I have read Termux Packaging Policy and understand that my request will be denied if it is found lacking.

In this case I can fine existing packages.
https://repology.org/project/zet/versions
I think we can charitably call that a passing grade on the "existing packages" criteria.
This project explicitly duplicates existing functionality.
But that is less of a dealbreaker.
This might still be a better fit for the TUR.