Formalize tags

[woile]

A set of tags should be formalized for applications to recognize.

I want to start initially with:

• name: name of the recipe, this name can be used later by the recipe reference @{woile/fav-sauce}
• tags: ways to make it easy to group recipes (e.g: easy, high-fiber, high-protein).
• lang: language used by the recipe. This would help with the units, for example if it's en-US we know that 1 cup is a US cup.
• category: should this be added? knowing that a recipe is a dish would allow adding more info to the recipe editor. Like if it's a dish, we can add a button to add nutrition.
• nutrition: a way to specify the macronutrients of a recipe
• images: links to an image album?
• cover: cover image?
• license: licensing using creative commons? https://chooser-beta.creativecommons.org/