When clicking a "checklist", we're parsing the raw to change the state of the checklist that was clicked. If there was an image URL with an empty alternative text in the raw "" it would consider the "[]" as an empty checklist item.
Internal - t/124499
As of #23867 this is now a real package, so updating the imports to
use the real package name, rather than relying on the alias. The
name change in the package name is because `I18n` is not a valid
name as NPM packages must be all lowercase.
This commit also introduces an eslint rule to prevent importing from
the old I18n path.
For themes/plugins, the old 'i18n' name remains functional.
