Completed adding v3 models (I think)

Going to start logic for building things out. attempting generic builder pattern first.

datamodel/low/reference.go

@@ -6,12 +6,12 @@ type HasNode interface {
     GetNode() *yaml.Node
 }
 
-type NodeReference[T comparable] interface {
-    GetValue() T
-    GetNode() *yaml.Node
+type NodeReference[T comparable] struct {
+    Value T
+    Node  *yaml.Node
 }
 
-type ObjectReference interface {
-    GetValue() interface{}
-    GetNode() *yaml.Node
+type ObjectReference struct {
+    Value interface{}
+    Node  *yaml.Node
 }