* feat: 🎸 Add worker serializer
Add worker serializer that focus' on `config_tags.type` and
`canonical_tags.type`.
[API](https://docs.google.com/document/d/1G-lfl8gk9NfoKFImSpHb90E3xC3CSEVDwVy3bJ9eOhA/edit#heading=h.9e06o4b8etpi)
✅ Closes: ICU-5241
* refactor: 💡 refactored `models/worker.js`
Because `canonical_tags` and `config_tags` are `readOnly` attributes, we
could use `attr` decorator instead of `fragment`.
✅ Closes: ICU-5241
* refactored `model/worker.js and deleted un-needed files
* refactor: 💡 Refactored model/worker.js and created test
Refactored model/worker.js to include custom method for POST route for
adding new worker.
BREAKING CHANGE: 🧨 no
✅ Closes: ICU-5241
* refactor: 💡 Refactored custom POST route method for worker
Refactored custom method on `model/worker.js` to include serialization
for `worker_genrated_auth_token`
BREAKING CHANGE: 🧨 no
✅ Closes: ICU-5241
* refactor: 💡 Refactor test
Refactor model/worker-test.js and serializers/worker.js
BREAKING CHANGE: 🧨 no
✅ Closes: ICU-5241
* Update addons/api/addon/serializers/worker.js
Co-authored-by: Dharini Jeeva <dharini@hashicorp.com>
* update worker.js documentation block
Co-authored-by: Dharini Jeeva <dharini@hashicorp.com>