Measurements systems. add type to the structures.

Expected Behavior / Situation

right now we have one structure

I think maybe that we need to add 'type' to Units? I'm not 100% sure about it, if you have troubles in matching stuff. together (one object with another) --> we need it then.

Actual Behavior / Situation

I want to change it. you can do it in any way. maybe we need to ask @vadim9999 so he confirm if we need to change structure by hands or maybe use a generator.

Modification Proposal