Group part rows by zIndex

[Yuripetusko]

Is your feature request related to a problem? Please describe.
It would be much clearer for the user if parts were grouped by zIndex, with collapsable component perhaps.

Describe the solution you'd like
We will have to fetch part data on the outer component, because currently it only fetches partIds. Then use something like ramda groupBy function to group all parts by zIndex, and display them in a way which is easier to manage when catalog has many parts

Describe alternatives you've considered
Not sure. Happy to hear some suggestions

Additional context

[Yuripetusko]

Added logic and very basic styling. Could use a better styling for sure