Move step running into enum for dynamic ordering (#1188)

Co-authored-by: Stuart Reilly <sreilly@scottlogic.com>

src/steps/os/windows.rs

@@ -7,10 +7,11 @@ use tracing::debug;
 
 use crate::command::CommandExt;
 use crate::execution_context::ExecutionContext;
+use crate::powershell;
+use crate::step::Step;
 use crate::terminal::{print_separator, print_warning};
 use crate::utils::{require, which};
 use crate::{error::SkipStep, steps::git::RepoStep};
-use crate::{powershell, Step};
 use rust_i18n::t;
 
 pub fn run_chocolatey(ctx: &ExecutionContext) -> Result<()> {