Django-turbo-helper

Dependency bugfix

Added type hinting, tidy up of mixin class inheritance.

Update form handling for changes in hotwired/turbo 7.0.0-beta.2:

- **TurboStreamFormMixin** class and supporting classes removed
- **TurboFormMixin** class added that just returns a 422 response on invalid
- **TurboStreamFormView**, **TurboStreamCreateView** and **TurboStreamUpdateView** classes removed
- **TurboFormView**, **TurboCreateView** and **TurboUpdateView** classes added, using new **TurboFormMixin**

Remove __str__ methods from TurboStream and TurboFrame classes

Add render() method to template proxies

Added

TurboStream and TurboFrame classes