add json file in playground

Author: larbish

playground/docus/content/authors/larbish.json

@@ -0,0 +1,8 @@
+{
+  "name": "Baptiste Leproux",
+  "avatar": {
+    "src": "https://avatars.githubusercontent.com/u/7290030?v=4"
+  },
+  "to": "https://x.com/_larbish",
+  "username": "larbish"
+}