Add variable poisoning utilities

[TzuChieh]

A good reference is from the appleseed renderer: https://github.com/appleseedhq/appleseed/blob/1e60a023d4a77965c867dbd296a71e061238acba/src/appleseed/foundation/utility/poison.h#L101

• [ ] Add poisoning utilities.
• [ ] Remove m_isSet in query objects.
• [ ] Poison some basic math types (which does not init their values for performance reasons)
• [ ] Poison SDL types (resources, structs, executors...)