[Feature Request] Assign alias to exercises

[victorcostap]

I'd like to request to be able to assign alias to exercises. I find it useful for 2 reasons:

• Some exercises can be known by more than one name
• It adds a simple "language support"

The way I think makes more sense to work is:

• User can assign an alias to an exercise (I guess it'd also make sense to allow more than one alias)
• User can choose which alias is the "main" one and the one that would be displayed with big text
• Maybe show the other alias (at least one more) in smaller text or parenthesis
• User can search for the exercise using any of the aliases