feat(recommendation list): back & front almost done

Backend:
* Added recommendation list model
* Added smart serializers/viewsets for the model
* Added DRF permissions `IsFollower` and `IsPublic`
* Backend handling of following,

Frontend:
* Cleaned setup
* Textblock ready
* Better save button
* List and view recommendation

Both:
Connected for creation and save of recommendation

Almost done #34
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