feat: enable float widget from sdk

[preda-bogdan]

Summary

Enables the Float Widget for Feedzy.
This links to the changes from the SDK here: https://github.com/Codeinwp/themeisle-sdk/pull/229
Testing is covered by the SDK PR.

Will affect the visual aspect of the product

YES

Screenshots

Test instructions

1. Use the SDK from the linked PR.
2. Check with the changes from here that the Float Widget is available for the free version.
3. Check that the links are redirecting correctly.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes Codeinwp/themeisle#1539.

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🎉 This PR is included in version 4.4.9 🎉

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