Gutenberg RTC: Add real_time_collaboration feature

[arthur791004]

Related to DOTCOM-16097

Proposed changes:

• Define Real-time Collaboration (RTC) as a WP.com plan feature for Business and above

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Apply changes to your sandbox
• Run wpsh as follows:

$ $blog_id = <blog_id>
$ echo wpcom_site_has_feature( WPCOM_Features::REAL_TIME_COLLABORATION, $blog_id ); // 0
$ add_blog_sticker( 'gating-business-q1', null, null, $blog_id );  
$ echo wpcom_site_has_feature( WPCOM_Features::REAL_TIME_COLLABORATION, $blog_id ); // 1
$ remove_blog_sticker( 'gating-business-q1', null, null, $blog_id );  

Changelog

• Generate changelog entries for this PR (using AI).

[github-actions]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

• ✅ Include a description of your PR changes.
  
• 🔴 Add a "[Status]" label (In Progress, Needs Review, ...).
  
• ✅ Add testing instructions.
  
• ✅ Specify whether this PR includes any changes to data or privacy.
  
• ✅ Add changelog entries to affected projects
  

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[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WoA dev site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin (WordPress.com Site Helper), and enable the feat/add-real-time-collaboration-feature branch.

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[Copilot]

Pull request overview

This PR adds a new real_time_collaboration feature constant to WPCOM_Features in the wpcomsh plugin, gating it behind the Business and Ecommerce plans. It is part of the Gutenberg Real-Time Collaboration (RTC) rollout (DOTCOM-16097).

Changes:

• Defines a new REAL_TIME_COLLABORATION public constant with slug 'real_time_collaboration'
• Maps the feature to WPCOM_BUSINESS_PLANS and WPCOM_ECOMMERCE_PLANS (explicitly excluding trial/WooExpress plans)

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[Copilot]

A Changelogger entry is missing for this PR. Per repository conventions (docs/pull-request.md and existing patterns in projects/plugins/wpcomsh/changelog/), any PR touching a project under /projects must include a changelog file in that project's changelog/ directory. Please add a new file under projects/plugins/wpcomsh/changelog/ (e.g., add-real-time-collaboration-feature) with the appropriate Significance, Type, and description fields, similar to other entries like add-social-unified-ui-ff.

[jp-launch-control]

Code Coverage Summary

This PR did not change code coverage!

That could be good or bad, depending on the situation. Everything covered before, and still is? Great! Nothing was covered before? Not so great. 🤷

Full summary · PHP report

[Copilot]

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