h-m: add fish

home-manager/features/fish.nix

@@ -0,0 +1,23 @@
+{ pkgs, ... }: {
+
+  programs.fish = {
+    enable = true;
+
+    functions = {
+      ddg = ''
+        if count $argv > /dev/null
+          ${pkgs.w3m}/bin/w3m https://lite.duckduckgo.com/lite?q=$argv
+        else
+          ${pkgs.w3m}/bin/w3m https://lite.duckduckgo.com
+        end
+      '';
+    };
+    
+    shellAliases = {
+      vim = "nvim";
+      vi = "nvim";
+      ddgo = "${pkgs.w3m} https://lite.duckduckgo.com";
+    };
+  };
+
+}