Full support of unavailable, sick, injured

Intervals allows users to set yourself to unavailable, sick or injured. lecoach should take this into account when creating the plan but also when a user has a plan and then sets this. also allow the user to set/edit these kind of settings in lecoach directly and sync them to intervals.icu.

1. allow user to set themselves unavailable, sick, injured in lecoach

2. automatically adapt existing plan to these statuses OR at least have lecoach suggest proactive changes

3. take unavailable into account when creating a plan

User input:
“I’m wondering if, before creating a training plan, we set “Unavailable” in Notes, Holiday, Sick, or Injured). It would be nice if the calculation could account for that and avoid the marked days. I can ask this in the chat, but I noticed it only adjusts the days surrounding it unless you explicitly ask it to recalculate the entire training plan.”