Deprecate TypeBuilder in favor of implementing the Named trait

[udoprog]

Heads up to anyone who's writing modules.

So given this:

#[derive(Any)]
struct Foo {
}

This:

module.ty(&["Foo"]).build::<Foo>()?;

Is now this instead:

#[derive(Any)]
struct Foo {
}

module.ty::<Foo>()?;

Also adds the #[rune(name = "..")] attribute which allows for overriding the name:

#[derive(Any)]
#[rune(name = "Bar")]
struct Foo {
}

module.ty::<Foo>()?; // will register "Bar".