Add as_any and as_any_mut

[stargazing-dino]

Adds as_any and as_any_mut. Helpful in the case of downcasting the traits into concrete types

[janhohenheim]

Looks good now! I removed the methods on the dialog runner because they would clutter the API a bit :)

[stargazing-dino]

Looks good now! I removed the methods on the dialog runner because they would clutter the API a bit :)

No worries, i forgot text_provider and variable_storage are already exposed so it's trivial to just call it on them directly

thanks :D