Overview for the porting of classic UI to Platform UI. Follow up to #3901 #2789

### Workflows
- [x] Run unit tests as part of CI #5011
- [x] Code coverage integration with coveralls
- [x] Enforce code styling (including comments) for tsx code
- [x] Run code style checks as part of CI #5011
- [x] Release: Docker #5011
- [ ] #5277
- [ ] https://github.com/inventree/InvenTree/issues/5278
- [ ] https://github.com/inventree/InvenTree/issues/5282

### Backend
- [x] Add SPA helpers #5011
- [x] Remove custom redirects #5011
- [x] Simple login #5209 #5207
- [x] Save ui settings https://github.com/inventree/InvenTree/pull/5343
- [ ] https://github.com/inventree/InvenTree/issues/6389
- [ ] https://github.com/inventree/InvenTree/issues/3101

### Docs
- [ ] Frontend architecture
- [ ] Code structure
- [x] Getting started for frontend
- [ ] Component docs (maybe storybook)

### Frontend base
- [x] Navigation #5207
- [x] Mega menu #5207
- [ ] https://github.com/inventree/InvenTree/issues/5323
- [x] URL/navigation structure #5207
- [x] Base page layout
- [x] Detail page layout
- [ ] https://github.com/inventree/InvenTree/issues/5354
- [ ] #5218
- [x] Barcode Scanning #5207
- [x] Notifications
- [ ] https://github.com/inventree/InvenTree/issues/5345
- [ ] https://github.com/inventree/InvenTree/issues/6283
- [ ] https://github.com/inventree/InvenTree/issues/6282
- [x] Social Login #5753
- [x] Social Registration #5753
- [ ] #5296
- [ ] https://github.com/inventree/InvenTree/issues/5888
- [ ] #5755
- [ ] https://github.com/inventree/InvenTree/issues/6285
- [ ] https://github.com/inventree/InvenTree/issues/6813
- [x] [PUI] Switch to native Tree component - https://mantine.dev/core/tree/#example-files-tree
- [ ] https://github.com/inventree/InvenTree/issues/7920

### Frontend pages
- [ ] https://github.com/inventree/InvenTree/issues/5324
- [x] User settings management #5016
- [x] Global settings management #5016
- [x] Part
- [x] Part Category
- [x] Stock Item
- [x] Stock Location
- [x] Company
- [x] Supplier Part
- [x] Manufacturer Part
- [x] Build Order
- [x] Purchase Order
- [x] Sales Order
- [x] User Managment #5016
- [ ] All "part" functions - https://github.com/inventree/InvenTree/issues/6022
- [ ] All "stock" functions
- [ ] All "build order" functions
- [ ] All "sales order" functions
- [ ] All "return order" functions
- [ ] All "purchase order" functions
- [ ] https://github.com/inventree/InvenTree/issues/7026

### Plugins
- [x] APIs for rendering plugins in UI - https://github.com/inventree/InvenTree/pull/7470
- [x] Plugin settings screen #5016
- [x] New / Refactor "Panel Mixin" support - https://github.com/inventree/InvenTree/pull/7470
- [ ] https://github.com/inventree/InvenTree/issues/5269

### Needs to be handled before next stable - follow-ups
- [x] Follow up to https://github.com/inventree/InvenTree/pull/5325 - Add tables
- [x] Allow to hide the server selector and configure custom server via Django settings #5343 @wolflu05
- [ ] https://github.com/inventree/InvenTree/issues/6554
- [ ] https://github.com/inventree/InvenTree/issues/5452
- [ ] https://github.com/inventree/InvenTree/issues/7869

### In the future (tm) - follow-ups
- [ ] After deprecating the old ui move the new ui to `/`. @wolflu05
- [ ] https://github.com/inventree/InvenTree/issues/7347