Add information on extension footprint analyzer

[ishakhsuvarov]

Purpose of this pull request

This pull request adds information about Extension Footprint analyzer feature of Magento Marketplace.

Affected DevDocs pages

• https://devdocs.magento.com/marketplace/sellers/extension-footprint.html

whatsnew
Added a new topic describing Extension Footprint Analysis on the Magento Marketplace.

[ghost]

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[BarnyShergold]

Nice new addition

[jeff-matthews]

Thanks for the new topic @ishakhsuvarov!

I've requested additional changes to get this ready for publication.

Please also add a new entry for this new topic in the table of contents (TOC) file. It probably makes sense to add it near the existing "Code Sniffer" entry: https://github.com/magento/devdocs/blob/master/src/_data/toc/marketplace-sellers.yml#L110

Or maybe it makes more sense to add it further down near the "checks" since this footprint analyzer isn't technically a test. What do you think?

[ishakhsuvarov]

Thank you for your review and fixes @jeff-matthews

I've added it TOC as the next entry after semantic version check. I think it's a good place for it since it's still a part of technical review even though it's not a test in traditional meaning.

[jeff-matthews]

Looks good. Thanks @ishakhsuvarov!

[jeff-matthews]

@magento import code to magento-devdocs/devdocs

[magento-engcom-team]

@jeff-matthews the branch with code successfully imported intomagento-devdocs/devdocs repository. Branch name: imported-magento-devdocs-8962.

[ghost]

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