Reorganize directory structure: move utility files to misc/ directory

- Move all non-wrapper files (testing scripts, documentation, utilities) to misc/ directory
- Keep SF CLI wrapper scripts and README.md in root directory for better organization
- Maintain clean root directory with only the actual wrapper scripts and main documentation
- All wrapper scripts remain easily accessible and discoverable
- Supporting files are organized in misc/ subdirectory

sf-check

@@ -207,6 +207,12 @@ run_diagnostics() {
 # Parse command line arguments
 VERBOSE=false
 
+# Show help if no arguments provided
+if [[ $# -eq 0 ]]; then
+  show_help
+  exit 0
+fi
+
 # Parse arguments manually for two-character options
 while [[ $# -gt 0 ]]; do
   case $1 in