fix: update remaining go-onvif references to onvif-go for complete branding consistency

- server/types.go: Manufacturer identifier 'go-onvif' → 'onvif-go'
- cmd/onvif-server/main.go: Manufacturer flag default 'go-onvif' → 'onvif-go'
- server/README.md: Documentation updated
- examples/manual-soap-test/main.go: Code comments updated (2 instances)
- examples/complete-demo/main.go: Code comment updated

Now using 'onvif-go' consistently across all project files, including
device identifiers, code comments, and documentation.

examples/complete-demo/main.go

@@ -10,7 +10,7 @@ import (
 	"github.com/0x524a/onvif-go/discovery"
 )
 
-// This is a comprehensive demonstration of all go-onvif features
+// This is a comprehensive demonstration of all onvif-go features
 func main() {
 	// Step 1: Discover cameras on the network
 	fmt.Println("=== Step 1: Discovering ONVIF Cameras ===")

examples/manual-soap-test/main.go

@@ -73,7 +73,7 @@ func main() {
 
 		if resp.StatusCode == 401 {
 			fmt.Println("💡 Authentication required - this is expected!")
-			fmt.Println("💡 Now testing with go-onvif client library...")
+			fmt.Println("💡 Now testing with onvif-go client library...")
 			fmt.Println()
 			testWithClient(username, password)
 		} else {
@@ -91,7 +91,7 @@ func testWithClient(username, password string) {
 	onvif := struct{}{}
 	_ = onvif
 
-	fmt.Println("Note: Would test with go-onvif client here, but keeping this simple.")
+	fmt.Println("Note: Would test with onvif-go client here, but keeping this simple.")
 	fmt.Println("The camera appears to be responding to ONVIF requests.")
 	fmt.Println()
 	fmt.Println("💡 Next step: Check if the credentials are correct")