✨ add nushell and vscodium configurations

modules/home/apps/nushell/default.nix

@@ -0,0 +1,69 @@
+{
+  lib,
+  pkgs,
+  config,
+  namespace,
+  ...
+}: let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.${namespace}.apps.nushell;
+in {
+  options.${namespace}.apps.nushell = {
+    enable = mkEnableOption "Whether to enable nushell customization.";
+  };
+
+  config = mkIf cfg.enable {
+    programs = {
+      nushell = {
+        enable = true;
+
+        extraConfig = ''
+          let carapace_completer = {|spans|
+            carapace $spans.0 nushell ...$spans | from json
+          }
+
+          $env.config = {
+            completions: {
+              case_sensitive: false # case-sensitive completions
+              quick: true    # set to false to prevent auto-selecting completions
+              partial: true    # set to false to prevent partial filling of the prompt
+              algorithm: "fuzzy"    # prefix or fuzzy
+              external: {
+                # set to false to prevent nushell looking into $env.PATH to find more suggestions
+                enable: true
+                # set to lower can improve completion performance at the cost of omitting some options
+                max_results: 200
+                completer: $carapace_completer # check 'carapace_completer'
+              }
+            }
+          }
+
+          $env.PATH = ($env.PATH |
+            split row (char esep) |
+            prepend /run/wrappers/bin |
+            prepend /home/jo/.nix-profile/bin |
+            append /usr/bin/env/run/wrappers/bin
+          )
+        '';
+      };
+
+      carapace.enable = true;
+      carapace.enableNushellIntegration = true;
+
+      starship = {
+        enable = true;
+        settings = {
+          add_newline = true;
+          character = {
+            success_symbol = "[➜](bold green)";
+            error_symbol = "[➜](bold red)";
+          };
+        };
+      };
+    };
+
+    home.packages = with pkgs; [
+      carapace
+    ];
+  };
+}