compose-derive

transform function into compose function

```rust

[compose]

pub fn MoviesScreen(movies: &Vec) { Column(cx, |cx| { for movie in movies { cx.tag(movie.id, |cx| MovieOverview(cx, &movie)); } }); }

// after expand

[track_caller]

pub fn MoviesScreen(cx: &mut compose_rt::Composer, movies: &Vec) { Column(cx, |cx| { for movie in movies { cx.tag(movie.id, |cx| MovieOverview(cx, &movie)); } }); } ```