Add "reps to be done" in exercise plan per exercise

[Ash0xF]

Currently we can only add how many sets to do per exercise but not how many reps to do for exercise.

Add ability to indicate on plan how many reps to do for exercise, aka Barbell overhead press -> 3x8-12.

Important for tracking and doing double progression.

[brandonp2412]

I appreciate the idea but it's not a feature I want to add