[Rust] Moves cargo env to rust file [Nix] small cleanups [Terminal] Removes special Alacritty TERM override

home-manager/features/development/rust.nix

@@ -1,7 +1,11 @@
-{ pkgs, ...}:
+{ pkgs, ... }:
 {
   home.packages = with pkgs; [
     rust-analyzer
     rustfmt
   ];
+
+  programs.zsh.envExtra = [
+    ". \"$HOME/.cargo/env\""
+  ];
 }