Upgrade to Drupal core 10.6.x

Jumping to core 10.6.x since it's pretty straightforward.

Only dependency issue is with linkit ^6.1 (core <10.5.0). Upgrading linkit to ^7.0 fixes the issue and removes a patch.

I initially tested the docker-scaffold upgrade using PHP8.4 but there were some deprecation warnings so decided to stick with PHP8.3.

Checklist:

• Created a drupalwxt/docker-scaffold 10.6.x branch - https://github.com/drupalwxt/docker-scaffold/tree/10.6.x
• Created drupalwxt/wxt 5.6.x branch and get tests passing - https://github.com/drupalwxt/wxt/actions/runs/20788945501
• Created drupalwxt/site-wxt 10.6.x branch and get tests passing - https://github.com/drupalwxt/site-wxt/actions/runs/20792050339
• Created wxt_library 10.6.x
• Created wxt_bootstrap 10.6.x

Changes:

• Update drupal/linkit from ^6.1 to ^7.0 (needed for core > 10.5)
• Updated unsupported drupal/media_entity_instagram from from ^3 to ^4
• Updated unsupported drupal/metatag from ^1.13 to ^2.2
• Updated unsupported drupal/toc_api from ^1.2 to ^2.0

All tests passing in GitHub, pushing to Drupal GitLab next.

Need to update our CKE5 plugins due to breaking changes in CKEditor5 v45+, the icons object is no longer exported from ckeditor5/src/core, so icons becomes undefined. Need to update to use ckeditor5/src/icons, as well as update dev dependencies for packages.json to use "ckeditor5": "^45.2.0" so we compile against the proper source code.

CKE5 plugin changes - https://github.com/drupalwxt/wxt/commit/0c4c26c9918a73e1deb937ae4d14b3b01736779b

New WxT release for core 10.6.x compatibility is now available, version 5.6.x.

Will create a follow-up ticket for the entity_embed related issue.