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

nix/modules/devshell.nix

@@ -0,0 +1,43 @@
+{inputs, lib, ...}: let
+  # FHS compatibility for NixOS (steam-run wrapper)
+  # Enable if bun-installed binaries fail to find system libraries
+  fhs = false;
+in {
+  perSystem = {system, ...}: let
+    pkgs = import inputs.nixpkgs {
+      inherit system;
+      config.allowUnfree = fhs;
+    };
+
+    fhsPackages = lib.optionals fhs [
+      pkgs.steam-run
+    ];
+
+    fhsSetup = lib.optionalString fhs ''
+      alias bun="steam-run bun"
+    '';
+  in {
+    devShells.default = pkgs.mkShell {
+      nativeBuildInputs = with pkgs;
+        [
+          bun
+          eslint
+          just
+          prettierd
+        ]
+        ++ fhsPackages;
+
+      shellHook = ''
+        ${fhsSetup}
+
+        if [ -f package.json ]; then
+          echo "Installing dependencies..."
+          bun install
+        fi
+
+        echo ""
+        echo "💡 Run 'just' to see available commands"
+      '';
+    };
+  };
+}

nix/modules/template.nix

@@ -0,0 +1,19 @@
+{inputs, ...}: {
+  flake = rec {
+    templates.default = {
+      description = "A minimal JavaScript project template with Bun and Nix";
+      path = inputs.self;
+    };
+
+    om.templates.javascript-template = {
+      template = templates.default;
+      params = [
+        {
+          name = "package-name";
+          description = "Name of the JavaScript package";
+          placeholder = "javascript-template";
+        }
+      ];
+    };
+  };
+}