Add plugin settings link

[masteradhoc]

All Submissions:

• Have you followed the Contributing guidelines?
• 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:

In the Plugins Admin Screen this PR adds a link for users to easily access the wc-smooth-generator settings.

Closes #169 .

How to test the changes in this Pull Request:

1. apply the pr
2. visit /wp-admin/plugins.php and see if there is a setting

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• [] Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?

Changelog entry

Add a settings Link in plugin overview

Enter a summary of all changes on this Pull Request. This will appear in the changelog if accepted.

FOR PR REVIEWER ONLY:

• I have reviewed that everything is sanitized/escaped appropriately for any SQL or XSS injection possibilities. I made sure Linting is not ignored or disabled.

[layoutd]

Looks good, just a couple changes!

[layoutd]

Looks good, couple of changes

[masteradhoc]

Thanks @layoutd - commit suggestions were added :)

[layoutd]

Great, thanks @masteradhoc!