feat: add telemetry

[Soare-Robert-Daniel]

Summary

• Add telemetry for feature usage.
• Removing dead code. (Like auth auto-close, which is always blocked by the browser because of the different script origin).
• Small refactoring.

Screenshot

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 https://github.com/Codeinwp/tweet-old-post-pro/issues/503

[pirate-bot]

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[vytisbulkevicius]

@Soare-Robert-Daniel,

I haven't checked this before but clicking the link that we added last "What do we track?" doesn't open the link but instead checks/unchecks the checkbox:

[pirate-bot]

🎉 This PR is included in version 9.0.28 🎉

The release is available on GitHub release

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