counting sort in Lua

[icemberg]

I would like to add an counting sort code in lua .Please assign me this task

[icemberg]

please label this for hacktoberfest 2024 issue

[appgurueu]

Sure. Some notes:

• Please try to follow the contribution guidelines.
• To make this generically useful, please take an optional key function as a parameter which maps array elements to their integer key. This should default to the identity function.
• Please try to implement it such that it is stable.