docs: add notice about this repo

README.md

@@ -1,3 +1,9 @@
+> [!NOTE]
+> Twoslash has been moved to the new repository [twoslashes/twoslash](https://github.com/twoslashes/twoslash) with some refactoring and improvements. The Shiki v1.0 integration is now [in Shiki's monorepo](https://shiki.style/packages/twoslash) as a transformer, which means Twoslash will now work everywhere Shiki is supported. We will make Shiki supports more high-level tools so Twoslash could later inherit that.
+>
+> This repository is for Shiki v0.x integration with Twoslash. As we port more integrations to the new format, this repo will fade out gradually.
+
+
 <center><img src="./misc/repo-icon.png" /></center>
 
 You take some Shiki, add a hint of TypeScript compiler, and 🎉 incredible statically generated code samples.
@@ -51,4 +57,4 @@ Then see the contributing [for advice](./CONTRIBUTING.md) and the vision file fo
 
 ###### Deploys
 
-Run: `pnpm deploy`.
+Run: `pnpm deploy`.