- add rack elevation view for one or multiple racks
- render front and rear device positions by rack unit
- show physical cabling below selected racks
- add site, location, rack, and empty-rack filters
- add network, leaf, spine, and aggregation switch icons
- add “Weitere Ansichten” navigation category
* corrected nodeId handling
* add models
* import models, migrate db
* correct migration deps
* load coordinates from db
* add serializers, correct imports
* add views and templates
* fix X-Y swap in help text
* add non-devices to coordinate group view
* [up] add config for custom images, better js
* [up] use bundler to bundle js
* [fix] remove domcontentloaded since defer is used
* [fix] formatting with black
* [fix] images drf api
* [up] add support for custom icons on additional roles: power panel, power feed, circuit
* [up] optimize topology generation by using `_id` when trying to access pk of related object
* [fix] kebab case instead of slugification
* [fix] use empty queryset in api views & change coord save logic