=== Goal
We want to inform users on all our projects where Partial blocks isn't deployed yet (except `enwiki` which wants to hold an RfC) to inform them about the upcoming deployment.
=== Acceptance criteria:
* For design, let's re-use the mock from {T194301}.
{F23683711, width=500}
** Text: //The partial blocks feature will be deployed on most wikis on January 6th and the user interface will change.//
** Button: //Learn more// - links to https://www.mediawiki.org/wiki/Help:Blocking_users
* All text will be translatable.
* Banner will only be visible on `Special:Block` on production wikis where Partial blocks isn't already deployed. Also it will not be displayed on enwiki, which will conduct its own RfC.
* Banner should ideally go up this or next week (week of Dec 16) and will stay up until after the deployment in January.
* Post-deployment of partial blocks, we will keep the banner up for another 2 weeks to let users know and learn about the changes they are seeing.
** Text: //You now have access to partial blocks on this wiki. This change allows you to make per-page and per-namespace blocks as necessary. //
** Button: //Learn more// - links to https://meta.wikimedia.org/wiki/Community_health_initiative/Partial_blocks
* The banner should be taken down on **Jan 21**.