Allow users to add recipes to a collection

[Moc]

Motivation

Sometimes you want to save a set of specific recipes, e.g. for special occasions such as Christmas dinners.

Proposed Solution

• Allow users to create a collection
• Allow users to save recipes to specific collections

Additional context

Could be part of the 'bookmarks' functionality, where a user first bookmarks a recipe, followed by an action to add the recipe to a specific collection (or create a new collection).