feature: resource adapters

[Paul-Bob]

Description

Fixes #1418

Breaking changes

• Avo::BaseResource -> Avo::Resources::Base
• Avo::Resources::ActiveRecord will replace the old Avo::BaseResource, now Avo::Resources::Base will keep what's shared by all resources types.
• Avo::ResourcesController -> Avo::ActiveRecordResourcesController and there is also a new controller type: Avo::HttpResourcesController

Todo

• [ ] HTTP resource generator
• [ ] Fix Http resources menu duplication

Checklist:

• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works

Screenshots & recording

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.

[codeclimate[bot]]

Code Climate has analyzed commit 64a7ee6f and detected 11 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	11

View more on Code Climate.

[github-actions[bot]]

This PR has been marked as stale because there was no activity for the past 15 days.

[adrianthedev]

Closing for now,