Rename directory "engines" to "languages"

languages/brainfuck/index.ts

@@ -0,0 +1,11 @@
+import { Renderer } from "./renderer";
+import { LanguageProvider } from "../types";
+import { BFRS, sampleProgram, editorTokensProvider } from "./common";
+
+const provider: LanguageProvider<BFRS> = {
+  Renderer,
+  sampleProgram,
+  editorTokensProvider,
+};
+
+export default provider;