chore: add dev.nix and VS Code settings for consistent local setup

Author: iamanishsrivastava

.idx/dev.nix

@@ -0,0 +1,26 @@
+{pkgs}: {
+  channel = "stable-24.05";
+  packages = [
+    pkgs.nodejs_20
+  ];
+  idx.extensions = [
+    
+  ];
+  idx.previews = {
+    previews = {
+      web = {
+        command = [
+          "npm"
+          "run"
+          "dev"
+          "--"
+          "--port"
+          "$PORT"
+          "--hostname"
+          "0.0.0.0"
+        ];
+        manager = "web";
+      };
+    };
+  };
+}

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "IDX.aI.enableInlineCompletion": true,
+    "IDX.aI.enableCodebaseIndexing": true
+}