Twenty Twelve: Replace front end jQuery usage with Interactivity API

[adamsilverstein]

This ticket focuses on removing jQuery as a frontend dependency for Twenty Twelve when the site is running WordPress >= 6.5 where we can leverage the Interactivity API instead.

This is similar to https://core.trac.wordpress.org/ticket/54171 which proposes replacing jQuery with vanilla JavaScript.

Note:

• Leveraging the Interactivity API for core themes will help us test and consume our own APIs.
• The Interactivity API will already be enqueued if any block leveraging the API is used (Query, expanding Search and Navigation for example)
• Existing code would stay in place for cases where the theme is used on WordPress < 6.5.

[sabernhardt]

Duplicate of #61027.

Let's discuss any possible integrations in (classic) bundled themes on one ticket.

[adamsilverstein]

Let's discuss any possible integrations in (classic) bundled themes on one ticket.

@sabernhardt

I can see the value in discussing the overall goals and approach of these changes in one place. The reason I chose to break these out was to enable individual contributors to work on one theme at a time.

[sabernhardt]

One ticket can have separate patches/pull requests for each theme, but the approach would need to be consistent (if it's even appropriate with these themes).