Add notes to an entry in a meal plan

[Jim-Duke]

Describe the solution you'd like
Have the ability to add a note to an entry in the meal plan. This also includes being able to add, edit, or delete a note to any existing entry. Not sure how best to view the note; because they may be large. Perhaps a simple icon to indicate the presence of a note which is only visible when you "open" the entry.

[iamericfletcher]

@julianpoy - What are your thoughts on this? I think it makes some sense since recipes allow for users to add notes. If you're open to this, would you mind me taking a stab at opening a first crack PR for your review in the near future?

[julianpoy]

@iamericfletcher Happy to have it added to the app! Have lots on my plate but would welcome a PR