[WIP][FEATURE] implemented sidebar for orders

__Tasks:__

- [ ] init of sidebar in list and detail view
- [ ] api for associated documents (order -> invoice, bill of delivery, etc)
- [ ] table component for documents
- [ ] test coverage
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | -
| BC Breaks     | -
| Doc           | -