reflective: Add Reflection{} placeholder and the New() factory

Signed-off-by: Alejandro Mery <amery@jpi.io>

reflective/reflection.go

@@ -0,0 +1,27 @@
+package reflective
+
+import "reflect"
+
+// Reflection provides Marshalling/Unmarshalling oriented view
+// of a value
+type Reflection struct {
+	v reflect.Value
+}
+
+// New creates a Reflection of the given pointer
+func New(v any) (*Reflection, error) {
+	rv := reflect.ValueOf(v)
+
+	if rv.Kind() != reflect.Pointer || rv.IsNil() {
+		err := &InvalidUnmarshalError{
+			Type: rv.Type(),
+		}
+		return nil, err
+	}
+
+	r := &Reflection{
+		v: rv,
+	}
+
+	return r, nil
+}