feat: add component generics

[mrvillage]

Adds support for passing generics straight into components using native support in rstml, should close #1176.

[gbj]

Awesome! Thanks!

[gbj]

Note to self re: the syntax, for when I add this to release notes, or for anyone else curious:

#[component]
pub fn GenericComponent<S>(ty: PhantomData<S>) -> impl IntoView {
    std::any::type_name::<S>()
}

#[component]
pub fn App() -> impl IntoView {
    view! {
        <GenericComponent<String> ty=PhantomData />
        <GenericComponent<usize> ty=PhantomData/>
        <GenericComponent<i32> ty=PhantomData/>
    }
}