Add ROSIDL enum support

Signed-off-by: Roman Sokolkov <roman.sokolkov@apex.ai>

CMakeLists.txt

@@ -30,6 +30,7 @@ set(action_files
 )
 
 set(idl_files
+  "idl/EnumsMessage.idl"
   # "idl/IdlOnlyTypes.idl"
 )
 

idl/EnumsMessage.idl

@@ -0,0 +1,25 @@
+module test_msgs {
+  module idl {
+    typedef SomeEnum SomeEnum__3[3];
+
+    module EnumsMessage_Enums {
+      enum SomeEnum {
+        ENUMERATOR1,
+        ENUMERATOR2
+      };
+    };
+
+    struct EnumsMessage {
+      SomeEnum enum_value;
+
+      @default (value="ENUMERATOR2")
+      SomeEnum enum_default_value;
+
+      SomeEnum__3 static_array_values;
+
+      sequence<SomeEnum, 3> bounded_array_values;
+
+      sequence<SomeEnum> dynamic_array_values;
+    };
+  };
+};