Icons: Allow stroke-related attributes in the icon registry sanitizer

[wildworks]

Since ​https://github.com/WordPress/gutenberg/pull/78808, icons in the icon library are being redrawn as stroke-based SVGs.

WP_Icons_Registry::sanitize_icon_content() does not allow some of the attributes those icons need in order to render. wp_kses() therefore strips them before the icon is stored or returned, and the icons no longer render correctly.

Gutenberg added the necessary attributes to its own sanitizer in the same PR, and the equivalent ones need to be added to the icon registry in core.

A more fundamental rework of the sanitizer is being explored in ​https://github.com/WordPress/gutenberg/pull/75550 and ​https://github.com/WordPress/wordpress-develop/pull/12197. This ticket is deliberately scoped to the minimal fix needed for the 7.2 release; the broader approach can land separately.

Trac ticket: https://core.trac.wordpress.org/ticket/66101

• Used the PR ​https://github.com/WordPress/gutenberg/pull/78808/changes#diff-0db0971437680e6fb99b96db691d69db288f3bfd690f00e1a397019326f442bf file as a reference to add the stroke-related attributes.

## Use of AI Tools

• Yes
• Claude Code, Opus 5.
• Used for writing unit tests for the PR and changes.

[hbhalodia]

Hi @wildworks, I have raised the PR to copy the changes and the new atributes that were added in the Upstream GB PR. Have also added the unit test cases for the same. Would appreciate your review on the PR.

Thanks,

[hbhalodia]

Hi @wildworks, Do the current ticket needed the support to add more additional attributes that are being added tracked and added by ​Issue and ​PR in Upstream?

[wildworks]

@hbhalodia, Please bear with me while I consider how to organize the PR.

[wildworks]

Upon further consideration, I am closing this ticket as a duplicate of #65795 to avoid splitting our efforts.

Upon further consideration, I am closing this ticket as a duplicate of #65795 to avoid splitting our efforts. Sorry for the confusion.