Icons: Add "sites" icon.

[jasmussen]

What?

Adds a "sites" icon. Related to WordPress/wordpress-develop#12270

Why?

Such a thing is missing from the library.

How?

It's a simple icon, reminiscent of the old, using the available space to create a clear silhouette.

Testing Instructions

npm run storybook:dev

go to Icons, Library, search for "sites"

Use of AI Tools

No.

[github-actions]

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Co-authored-by: jasmussen <joen@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: fushar <fushar@git.wordpress.org>

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[t-hamano]

Nice one!

[fushar]

Super nit but should this list be sorted by slug? So this entry should be after "site-logo".

[t-hamano]

So this entry should be after "site-logo".

Nice catch! That's exactly right.

[jasmussen]

Thank you for the feedback, I've updated the sorting and will merge after the checks pass.

[github-actions]

Flaky tests detected in 3027b23.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/29240362457
📝 Reported issues:

• [Flaky Test] adds and activates a new tab when pressing Enter at the end of a tab label #80106 in /test/e2e/specs/editor/blocks/tabs.spec.js

[t-hamano]

👍