Add Support for Premium Plugin Activations

[arunshenoy99]

Proposed changes

• Replaced static method calls with the instantiation of PLSUtility where required.
• Modified the install_premium_plugin method to handle license activation after the plugin is installed when the activate flag is true.
• Implemented a listener that listens for premium plugin activations and activates the license based on the premium plugin’s basename.

Ref: newfold-labs/wp-module-pls#6

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