Introduce IsProviderFor trait to help improve compile errors

[soareschen]

• Introduce IsProviderFor<ComponentName, Context, Params> trait to serve as a way to capture constraints of provider implementations.
• Introduce CanUseComponent<ComponentName, Params> as an alias to check for the implementation of IsProviderFor on a context.
• Introduce #[cgp_provider(ComponentName)] macro to automatically implement IsProviderFor using the constraints specified in the impl block of a provider.
• Update delegate_components macro to also implement IsProviderFor for each implementation of DelegateComponent.
• Introduce a provider-supertrait feature flag on cgp-component-macro to add IsProviderFor as a supertrait of a provider trait. This will be enabled by default once all existing CGP code has been migrated to use #[cgp_provider].