Add a Type argument to route so that the dynamic segment / parameter names can also be intellisensed

[NullVoxPopuli]

proposed api:

 const tree = route({
      blogs: route('blogs', {
        show: route<{ blog_id: number }>(':blog_id', {
          edit: route('edit'),
          posts: route('posts', {
            show: route<{ post_id: string }>(':post_id'),
            edit: route<{ post_id: string }>(':post_id/edit'),
          }),
        }),
      }),
    });

tree.blogs.show.posts.edit.with({ 
  /* TS should complain if blog_id and post_id are not present */ 
});

Once this is added, we can cut a 1.0 release