Add file size to script output

Author: jaidev17

tools/generate-spellcheck-non-draft.sh

@@ -137,3 +137,4 @@ echo ""
 echo "Generated spell check configuration: $output_config"
 echo "  Install guides: $install_count"
 echo "  Learning Path source files: $lp_count"
+echo "  File size: $(wc -c < "$output_config") bytes"