add premium upsell component

[vraja-pro]

Context

Summary

This PR can be summarized in the following changelog entry:

• [@yoast/related-keyphrase-suggestions 0.1.0] Adds the premium upsell ad with new design for the related keyphrase suggestions modal.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Edit a post with focus keyphrase.
• Make sure Yoast premium in disabled or uninstalled.
• Click on "Get related keyphrases".
• Log in to semrush and return to the post to see you are getting the modal with related keyphrase suggestions.
• Check that you see the upsell ad on the top of the modal:
  
• Enable screen reader and focus on the button, check it says "Opens in a new browser tab"
• Click on the button and check the link opens in a new tab.

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes Tailwindify the upsell in the related keyphrase suggestions modal

[coveralls]

Pull Request Test Coverage Report for Build 1e6bc1e4540bc564ae74cdd80f96af35ebc9aa31

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.003%) to 54.701%

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Files with Coverage Reduction	New Missed Lines	%
packages/js/src/components/modals/SEMrushUpsellAlert.js	2	0.0%

Totals
Change from base Build 9d1cb6a14c317cc44e1470990e1289fdaaf594fe:	-0.003%
Covered Lines:	29749
Relevant Lines:	54680

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💛 - Coveralls