Android: Add to official "Termux packages"

[shuvashish76]

https://github.com/termux/termux-packages
reference: https://github.com/termux/termux-packages/blob/master/CONTRIBUTING.md

• alternative: https://github.com/termux-user-repository/tur (package policy)

[trevorbayless]

I was looking into this after your comment and came across the following on the URL you linked here:

In order to provide service at reasonable quality, requested packages should met these conditions:

• Not installable through language-specific package managers: ..., ..., pip

Which cli-chess is installable by.

[shuvashish76]

• TUR policy https://github.com/termux-user-repository/tur/wiki/TUR-package-policy. looks good to me.
• https://github.com/termux-user-repository/tur#contribution