add vs code snippets for nix modules

.vscode/nixmodule.code-snippets

@@ -0,0 +1,46 @@
+{
+  // If scope is left empty or omitted, the snippet gets applied to all languages. The prefix is what is
+  // used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
+  // $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders.
+  // Placeholders with the same ids are connected.
+  "Nix Module with Enable Option": {
+    "scope": "nix",
+    "prefix": "nixmodule",
+    "body": [
+      "{ config, lib, pkgs, ... }:",
+      "let",
+      "  cfg = config.mySystem.${1:moduleName};",
+      "in",
+      "{",
+      "  options.${1:moduleName} = {",
+      "    enable = lib.mkEnableOption \"${2:Description of the module}\";",
+      "  };",
+      "",
+      "  config = lib.mkIf cfg.enable {",
+      "    $0",
+      "  };",
+      "}"
+    ],
+    "description": "Creates a blank Nix module with an enable option"
+  },
+  "Nix Home Manager Module with Enable Option": {
+    "scope": "nix",
+    "prefix": "nixmodule-homemanager",
+    "body": [
+      "{ config, lib, pkgs, ... }:",
+      "let",
+      "  cfg = config.myHome.programs.${1:moduleName};",
+      "in",
+      "{",
+      "  options.${1:moduleName} = {",
+      "    enable = lib.mkEnableOption \"${2:Description of the module}\";",
+      "  };",
+      "",
+      "  config = lib.mkIf cfg.enable {",
+      "    $0",
+      "  };",
+      "}"
+    ],
+    "description": "Creates a blank Nix module with an enable option"
+  }
+}