Feature request: move constant away from a function to the top of the module.

There should be a way to extract constant without scrolling viewport up, then down again.

Rust analyzer already prodives "extract variable" and "promote varianbe to constant" code actions. The missing step is moving the constant away from the function (maybe also replacing occurrences of the same value with it on the way).

Code:

fn second() {
   let a = 555;
}
fn main() {
    ┃const VAR_NAME : i32 = 555;
    println!("{}", VAR_NAME);
}

After "Move constant to the top":

const VAR_NAME : i32 = 555;

fn second() {
   let a = 555;
}
fn main() {
    ┃println!("{}", VAR_NAME);
}

Note that viewport and cursor should stay in original location, not where the constant ended up.

After "Move constant to the top, also replace occurrences":

const VAR_NAME : i32 = 555;

fn second() {
   let a = VAR_NAME;
}
fn main() {
    ┃println!("{}", VAR_NAME);
}

No repository files or tests are named. Start by reading rust-analyzer’s existing “extract variable” and “promote variable to constant” code-action entry points; done should cover moving the constant to the module top, preserving the original viewport and cursor location, and determining whether occurrence replacement is included.