Building out schema comparison mechanism

Which has led to a new wider hashing capability for the low level API. hashing makes it very easy to determine changes quickly, without having to run comparisons to discover changes, could really speed things up moving forward.

datamodel/low/extraction_functions.go

@@ -544,3 +544,8 @@ func ExtractExtensions(root *yaml.Node) map[KeyReference[string]]ValueReference[
 	}
 	return extensionMap
 }
+
+// AreEqual returns true if two Hashable objects are equal or not.
+func AreEqual(l, r Hashable) bool {
+	return l.Hash() == r.Hash()
+}