Deploy monorepo changes

[mlewand]

Provide a description of the task

This will be a final step in our migration.

We can't just partially deploy the work to ckeditor5 repo (a lot of things will break). Instead we're verifying our work on a different, sandbox clone of ckeditor5 repository and we're creating an instruction that should be followed during the deploy.

[mlewand]

Steps

• Consider merging stable to master in ckeditor5-* repos.
• Merge the monorepo-pending branch to master in all packages, except main ckeditor5 repository.
• Merge all subpackages to the main ckeditor5 repository (instruction)
• Merge the monorepo (created in previous step) and monorepo-pending branch to master in the main repository.
• Cleanup all the ckeditor5-* (subpackage) repositories
  • Update readmes with information that repositories are no longer maintained and main repo should be used
  • Archive all repos
• Merge master branch to the stable branch - new structure and docs should be applied to stable branch too
  • Rebuild & publish updated documentation
• Merge monorepo branch in ckeditor/ckeditor5-dev repository.

Post deploy testing

• Prepare a sample PR that breaks unit tests.
• Prepare a sample PR that reduced the CC.
• Close/remove all the test PRs made while testing.
• Remove merged monorepo migration branches
  • monorepo-pending
  • monorepo-post-migration

[pomek]

Remove lint task from package.json, delete .gitignore and other files in a directory that isn't an alone repository anymore. Review package.json – dev/dependencies, repository URL, bugs URL etc.
I do not recommend doing it manually. A script for doing this could be helpful.

[mlewand]

All right, all the necessary steps were performed. Docs deployment and repo archive will be handled later.