1.0.0: Add compatibility for #[MapEntity] attribute

We have been using this bundle productively for years, so a 1.0 and the associated start of semantic versioning is long overdue.

With this release, we are introducing support for the #[MapEntity] attribute, which replaces the deprecated @ParamConverter annotation since Symfony 6.2. ParamConverters and other methods that provide controller action arguments continue to work.