🔨(project) add json, cjs and js extensions to prettier config

Prettier had some missing extensions in the config, this commit
added them, we then prettified the whole project. We
ignore the `cunningham-tokens` files.

packages/tokens/src/lib/tsconfig.json

@@ -1,8 +1,6 @@
 {
   "extends": "@openfun/typescript-configs/node.json",
-  "include": [
-    "./*"
-  ],
+  "include": ["./*"],
   "compilerOptions": {
     "baseUrl": "./",
     "outDir": "../../dist/lib",