nh: init and remove makeshift fish function

flake.lock

@@ -1057,6 +1057,26 @@
         "type": "github"
       }
     },
+    "nh-flake": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ]
+      },
+      "locked": {
+        "lastModified": 1749409404,
+        "narHash": "sha256-v02NsZ589zzPq5xsCxyrG1/ZkFbbMkUthly50QdmYKo=",
+        "owner": "nix-community",
+        "repo": "nh",
+        "rev": "003dd72d3234361c93d5be7ec9766c88e0dd1052",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nh",
+        "type": "github"
+      }
+    },
     "nix": {
       "inputs": {
         "flake-compat": [
@@ -1451,6 +1471,7 @@
         "hyprland-plugins": "hyprland-plugins",
         "hyprlock": "hyprlock",
         "hyprpanel": "hyprpanel",
+        "nh-flake": "nh-flake",
         "nix-ld": "nix-ld",
         "nixos-hardware": "nixos-hardware",
         "nixos-wsl": "nixos-wsl",