Mark WiKit's code repository as deprecated (#693)

With Wikit no longer being used in any of our products, we should
communicate clearly that it's code base is currently unmaintained,
will no longer be supported and no new contributions are accepted.

Update the README to mark the repo as deprecated in the project
title, the repository description, and at the start of the
`Development` section of the README.

Bug: T382049

Author: codders

README.md

@@ -1,21 +1,16 @@
-# WiKit
+# WiKit [DEPRECATED]
 
 [![wikit-vue-components](https://img.shields.io/npm/v/@wmde/wikit-vue-components?label=wikit-vue-components)](https://www.npmjs.com/package/@wmde/wikit-vue-components)
 [![wikit-tokens](https://img.shields.io/npm/v/@wmde/wikit-tokens?label=wikit-tokens)](https://www.npmjs.com/package/@wmde/wikit-tokens)
 [![lerna](https://img.shields.io/badge/maintained%20with-lerna-cc00ff.svg)](https://lerna.js.org/)
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
 
-[![github](https://github.com/wmde/wikit/workflows/Build%20and%20Deploy%20documentation/badge.svg)](https://wmde.github.io/wikit/)
-[![github](https://github.com/wmde/wikit/workflows/Test%20and%20Deploy/badge.svg)](https://www.chromatic.com/builds?appId=5efdb3b5f65950002286285d)
-
-[![Sauce Test Status](https://app.saucelabs.com/buildstatus/wikit)](https://app.saucelabs.com/u/wikit)
-
-[![Sauce Test Status](https://app.saucelabs.com/browser-matrix/wikit.svg)](https://app.saucelabs.com/u/wikit)
-
-The Wikibase Design System and home of WMDE-supported component implementations.
+[DEPRECATED] The former Wikibase Design System and home of its component implementations.
 
 ## Development
 
+Wikit is no longer maintained. For a similar vue component library, please see [@wikimedia/codex](https://github.com/wikimedia/design-codex)
+
 This project uses [lerna](https://lerna.js.org/) to orchestrate multiple packages.
 
 The following examples use `docker` and `docker-compose` to ease creating a level playing field for development but they are not essential to this project.