prettier: Only proseWrap markdown files

Author: uint

.prettierrc.json

@@ -1,3 +1,10 @@
 {
-  "proseWrap": "always"
+  "overrides": [
+    {
+      "files": "*.md",
+      "options": {
+        "proseWrap": "always"
+      }
+    }
+  ]
 }