Add Treesitter support to Vim upgrade (#184)

* Add `:TSUpdate` to Vim upgrade

* Reformat `freebsd.rs`

Co-authored-by: Thomas Schönauer <37108907+DottoDev@users.noreply.github.com>

src/steps/os/freebsd.rs

@@ -1,4 +1,6 @@
 use crate::command::CommandExt;
+use crate::config::Step;
+use crate::execution_context::ExecutionContext;
 use crate::executor::RunType;
 use crate::terminal::print_separator;
 use crate::utils::require_option;