Initial commit: minimal JavaScript template with Nix

Features:
- Nix + Flakes for reproducible environments
- Bun (fast JavaScript runtime)
- Vite (development server & build tool)
- ESLint + Prettier (linting & formatting)
- Devshell commands via just
- Modular structure using flake-parts
- Omnix template support for initialization

flake.nix

@@ -0,0 +1,18 @@
+{
+  description = "Nix template for JavaScript projects, powered by Bun";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    systems.url = "github:nix-systems/default";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs:
+    inputs.flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = import inputs.systems;
+      imports = [
+        ./nix/modules/devshell.nix
+        ./nix/modules/template.nix
+      ];
+    };
+}