Create Multi-Part Model

### Description

The created stl file is currently a single body. If the body would be instead made up of multiple parts it would make it possible to create much more compelling multi color prints of our skylines.

### Requirements

- create multi-part body
- Skyline should be a body
- Base should be a body
- Logo,name and year(s) should be a body

### Definition of Done

- [ ] body is made out of multiple parts

### Additional Notes

It might be even cool/feasible to make every bar in the skyline a single part