A describe "attribute" to display the expression in a readable way

[glcraft]

It would be interesting to have a function or an attribute @describe to describe the expression written on the right.

Here are a few examples of the input of fend, and the output expected (kinda...)

Input	Output
@describe exp(2)	Exponential of 2
@describe 2kg to pound	Convert unit from 2 kilograms to pound
@describe 0 °C + 1 kelvin	Add 1 kelvin to 0 degree Celsius, displayed in degree Celsius

This is a quick example. It's not meant to be like I wrote it. The idea is just to display a readable representation of the expression.