Added method to toggle jetpack modules

[abhijitb]

Proposed changes

Added support for toggling Jetpack modules.
Jetpack API : https://github.com/Automattic/jetpack/blob/trunk/docs/rest-api.md#post-wp-jsonjetpackv4settings
Jira Ticket : https://jira.newfold.com/browse/PRESS0-1578

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Video

Checklist

• I have read the CONTRIBUTING doc
• I have viewed my change in a web-browser
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments