Clean up (front-end) types

[philippotto]

For example:

• StoreState.tracing is a HybridTracing, but actually this should be an annotation. Rename store.tracing to store.annotation in frontend #8490
• Rename admin_rest_api to rest_api Renamed file admin_rest_api to rest_api #8587
• Rename oxalis to webknossos
  • OxalisState to WebknossosState Rename oxalis references to WK #8591
  • OxalisModel to WebknossosModel Rename OxalisModel to WebKnossosModel #8600
  • OxalisController to WebknossosController Rename OxalisModel to WebKnossosModel #8600
  • frontend/javascripts/oxalis to frontend/javascripts/webknossos Rename directory javascripts/oxalis to javascripts/viewer #8601
• Rename api_flow_types.ts to api_types.ts Renamed file api_flow_types.ts to api_types.ts #8583

[hotzenklotz]

@philippotto Is there anything else that should be cleaned up? Or are we satisfied with all the recent changes and this issue can be considered closed?

[philippotto]

I think my main gripes are solved. for everything else, I can open a new issue once I've got something :) thank you for your help on this issue!