Implement a proper endpoint/command mapper

[LuanRT]

Describe your suggestion

Currently, the Actions class is doing all the heavy lifting when an endpoint's payload needs to be modified, and it is not very efficient.

Other details

YouTube's web app uses an object that maps all endpoints/commands to their respective classes, which are responsible for providing API paths, building payloads, and more. We could do the same.

Checklist

• I am running the latest version.
• I checked the documentation and found no answer.
• I have searched the existing issues and made sure this is not a duplicate.
• I have provided sufficient information.