first commit

core/theme/rtlCache.ts

@@ -0,0 +1,10 @@
+import createCache from "@emotion/cache";
+import { prefixer } from "stylis";
+import rtlPlugin from "stylis-plugin-rtl";
+
+const rtlCache = createCache({
+  key: "muirtl",
+  stylisPlugins: [prefixer, rtlPlugin],
+});
+
+export default rtlCache;