`discourse-common` was created in the past to share logic between the
'wizard' app and the main 'discourse' app. Since then, the wizard has
been consolidated into the main app, so the separation of
`discourse-common` is no longer useful.
This commit moves `discourse-common/(lib|utils)/*` into
`discourse/lib/*`, adds shims for the imports, and updates existing
uses in core.
Followup 8d5c4ecc3398611764a4459c0e92f0fb90edd90f
Implement review suggestions from https://github.com/discourse/discourse/pull/30541
after merge, and also fix other hardcoded strings on this
dashboard.
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.
Note that this commit will also disable daily grouping for datasets with more than 30 data points. This will also smartly do the grouping by month when grouping a full year.
