feat: implement screendesign

src/BusProNet/Model/PersonalData.php

@@ -27,7 +27,7 @@ class PersonalData
     public ?string $name = null;
 
     #[Assert\NotBlank(message: 'Bitte angeben', groups: ['Default', 'personal_data'])]
-    public string $firstName = '';
+    public ?string $firstName = '';
 
     public ?string $salutation = null;
     public ?string $title = null;
@@ -55,6 +55,11 @@ class PersonalData
         $this->communication = new Communication();
     }
 
+    public function getFullName(): string
+    {
+        return sprintf('%s %s', $this->firstName, $this->name);
+    }
+
     /**
      * Converts the personal data to API payload format.
      *