Upgrade to the Rust 2024 edition (#2367)

* Update to rust 2024 edition

* Fixes

* Clean up imports

* Cargo fmt again

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

shell.nix

@@ -33,7 +33,7 @@ let
   rustc-wasm = pkgs.rust-bin.stable.latest.default.override {
     targets = [ "wasm32-unknown-unknown" ];
     # wasm-pack needs this
-    extensions = [ "rust-src" "rust-analyzer" "clippy"];
+    extensions = [ "rust-src" "rust-analyzer" "clippy" "cargo"];
   };
 in
   # Make a shell with the dependencies we need
@@ -41,7 +41,6 @@ in
     packages = with pkgs; [
       rustc-wasm
       nodejs
-      cargo
       cargo-watch
       cargo-nextest
       cargo-expand