feat: Use ingredients to mix ingredients

[jo-gross]

Is there an existing issue for this?

• I have searched the existing issues and nothing seems to be related to my idea.

Is your feature request related to a problem? Please describe. What is your idea?

As @jhns-de mentioned in a personal discussion: Somtimes it would be nice to use ingredients to make a new ingredient. So there must be a way to create an ingredient from other ingredients.

Describe the solution you'd like. How should it look in the app?

I have no idea for a nice realisation of this. So your welcome to share your ideas, how such a ingredient recipe could look like.

@jhns-de can you please share more infos about how such an implementation could look like?

Would a basic mixing ratio based recipe would fulfill the requirements or should it be more detailed?

Anything else? (Additional Context)

By introducing such a feature, the calculations gets way more complex by calculating how many ingredients you have to buy.