Feat: convert mileage in emoji format

[magikid]

In Worf’s Calisthenics, we use emoji to denote mileage of our exercise. It would be really cool if the bot could convert these too.

For example, I ran 5 kilometers this morning and posted this:

1️⃣1️⃣🐇 1️⃣🐶 1️⃣🏃0️⃣🦄5️⃣<:keiko_wtf_judgement:759613833869656144> 🏊‍♂️🌫🏃‍♂️

Keiko emoji denote kilometers and O’Brien emoji denote miles.