"Extract Variable" doesn't properly work with use and case

[GearsDatapacks]

The "extract variable" code action is offered in a couple of places where it shouldn't be. Inside use callbacks:

import gleam/result

pub fn main() {
  use x <- result.try(todo)
  Ok(x + 1)
}

Which transforms into:

import gleam/result

pub fn main() {
  let value = Ok(x + 1)
  use x <- result.try(todo)
  value
}

And also inside a case body:

pub fn main(result: Result(Int, String)) {
  case result {
    Ok(value) -> value + 1
    Error(_) -> panic
  }
}

Which becomes:

pub fn main(result: Result(Int, String)) {
  let int = value + 1
  case result {
    Ok(value) -> int
    Error(_) -> panic
  }
}

In both of these cases, a variable is referenced outside of the scope which it is created in, producing invalid Gleam code.

[lpil]

Oh dear! Thank you