feat: Make the set of names of attributes set on a field/type available.

Author: chrisdutz

code-generation/protocol-base-mspec/src/main/java/org/apache/plc4x/plugins/codegenerator/language/mspec/model/definitions/DefaultTypeDefinition.java

@@ -42,6 +42,10 @@ public String getName() {
         return name;
     }
 
+    public Set<String> getAttributeNames() {
+        return attributes.keySet();
+    }
+
     public Optional<Term> getAttribute(String attributeName) {
         if (attributes.containsKey(attributeName)) {
             return Optional.of(attributes.get(attributeName));