refactor(shell): split shell config

home/shell/starship.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, ... }:
+
+{
+  # starship prompt
+  programs.starship = {
+    enable = true;
+    settings = {
+      add_newline = false;
+      status.disabled = false;
+      status.symbol = "❌ ";
+      aws.disabled = true;
+      gcloud.disabled = true;
+
+      # kitty/neovim don't play well with multi-width emojis
+      nix_shell.symbol = " ";
+    };
+  };
+}