Support user-created meals

[staticvoidmainmaui]

Description:

We need to allow users to create and save their own meals.

Requirements

• Users can create a custom meal with a name, ingredients, and optional instructions
• User-created meals are stored per-user in Firestore
• Meals page shows the user's saved meals (not hardcoded/app-provided ones)
• Users can edit and delete their own meals

Endpoints (to add)

Method	Route	Purpose
POST	/meals	Create a user meal

[AndrewFesenko]

Also to add on to this. Make meal data accurate such as meal %'s, adding to list actually adds to list (dont implement until list is setup to be linked with users)