chore: revert neovim changes, remove tmux + fish from nix-darwin 🔨

nixos/flake.lock

@@ -34,6 +34,27 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757130842,
+        "narHash": "sha256-4i7KKuXesSZGUv0cLPLfxbmF1S72Gf/3aSypgvVkwuA=",
+        "owner": "nix-darwin",
+        "repo": "nix-darwin",
+        "rev": "15f067638e2887c58c4b6ba1bdb65a0b61dc58c5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-darwin",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
     "nixos-wsl": {
       "inputs": {
         "flake-compat": "flake-compat",
@@ -102,6 +123,7 @@
     },
     "root": {
       "inputs": {
+        "nix-darwin": "nix-darwin",
         "nixos-wsl": "nixos-wsl",
         "nixpkgs": "nixpkgs_2",
         "vscode-server": "vscode-server"