Dev - CleverReach Integration

[MILAN88888]

All Submissions:

• Have you followed the Everest Forms Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR introduces the new cleverreach integration.
Create account : - https://eu2.cleverreach.com/admin/

Depedency PR:

https://github.com/wpeverest/everest-forms-pro/pull/962

How to test the changes in this Pull Request:

1. Goto Create account > login > dashboard > Recipients > Add one list.
2. After adding list goto > my account > interfaces > RestApi > Create auth ( not need to put redirect url leave as it is) > choose scopes > create
3. Goto Settings > Integration > CleverReach > connect
   4.Go to the form setting > integration > clevereach > choose field to sync and for custom field create attributes from check screenshots
4. After submission check the list.

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully run tests with your changes locally?
• Have you updated the documentation accordingly?

Changelog entry

Dev - CleverReach integration.

[NirajChaudhary143]

LGTM 👍

[riteelama]

LGTM 👍

[deepench]

LGTM 👍

[joshianup1]

LGTM 👍