Add ability to mark a recipe as a favorite

[mblennegard]

Is your feature request related to a problem? Please describe. The way I have solved it previously has been to tag all favorite recipes with five stars or similar, but sometimes you have a five star recipe that is not a favorite due to the complexity of the recipe. Along the same lines you may have many 3 or 4 star recipes that are most definitely favorite ones due to them being go-to recipes during the weekdays or similar.

Describe the solution you'd like

• Add a button to mark a recipe as favorite.
• Add a favorites menu option to view all favorites.

[reaper47]

Result over at recipya-rs (not ready to self-host yet):

https://github.com/user-attachments/assets/559a803a-6a70-4cfc-a40d-5e68e8d4940c