ci: add diff for debugging unstaged files

Author: cchanche

.github/no-unstaged-files.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+git diff
+
 if [[ "$(git status --porcelain)" != "" ]]; then
   git status
   echo "::error::💥 Unstaged changes detected. Locally try running: npm run prettier && npm run lint --fix && npm run build"