chore: redo addons page content

[HardeepAsrani]

Summary

This PR updates Addons page, and makes few changes:

• Removes separate Field cards and replaces them with a single card outlining all the field types.
• Redoes the description of Addons, and adds Docs link where I could find them.
• Removes Get Starter link for Pro users.

Will affect visual aspect of the product

YES

Screenshots

Test instructions

• Make sure the content is relevant.

Check before Pull Request is ready:

• [x] I have written a test and included it in this PR
• [x] I have run all tests and they pass
• [x] The code passes when running the PHP CodeSniffer
• [x] Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• [x] Security and Sanitization requirements have been followed
• [x] 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/ppom-pro/issues/388.

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[selul]

@HardeepAsrani great 🚀

[pirate-bot]

:tada: This PR is included in version 33.0.0 :tada:

The release is available on GitHub release

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