Refactor XML response handling in device extended and security tests

- Adjusted formatting in XML response strings for consistency in device_extended_test.go and device_security_test.go.
- Improved readability by aligning XML declaration and body content.
- Updated mock server responses to ensure proper handling of various ONVIF operations.

Enhance device security and storage handling

- Refactored struct field declarations in device_security.go and device_storage_test.go for improved clarity.
- Ensured consistent formatting across struct definitions and XML tags.

Standardize whitespace and formatting across multiple files

- Removed unnecessary blank lines and adjusted indentation in discovery, imaging, media, and PTZ server files.
- Improved overall code readability and maintainability by ensuring consistent formatting.

Update example applications for better readability

- Cleaned up whitespace in example applications to enhance code clarity.
- Ensured consistent formatting in main.go files across various examples.

Refactor server and SOAP handler code for consistency

- Standardized struct field declarations and XML tag formatting in server and SOAP handler files.
- Improved readability by aligning struct fields and ensuring consistent use of whitespace.

General code cleanup and formatting adjustments

- Applied consistent formatting across various files, including types.go and test files.
- Enhanced readability by aligning struct fields and removing unnecessary blank lines.

client.go

@@ -21,7 +21,7 @@ type Client struct {
 	password   string
 	httpClient *http.Client
 	mu         sync.RWMutex
-	
+
 	// Service endpoints
 	mediaEndpoint   string
 	ptzEndpoint     string
@@ -130,7 +130,7 @@ func normalizeEndpoint(endpoint string) (string, error) {
 	if err != nil {
 		return "", fmt.Errorf("invalid IP address or hostname: %w", err)
 	}
-	
+
 	if parsedURL.Host == "" {
 		return "", fmt.Errorf("invalid endpoint format")
 	}
@@ -497,4 +497,3 @@ func generateNonce() string {
 	// Generate a simple nonce
 	return fmt.Sprintf("%d", time.Now().UnixNano())
 }
-