feat: envrc flake support

.envrc

@@ -0,0 +1,4 @@
+# Check if nix command is available before trying to use flake
+if command -v nix >/dev/null 2>&1; then
+    use flake
+fi

flake.nix

@@ -19,14 +19,25 @@
     in
     {
       devShells = forEachSystem (pkgs: {
-        default = pkgs.mkShell {
+        default =
+          let
+            kilo = pkgs.writeShellScriptBin "kilo" ''
+              cd "$KILO_ROOT"
+              exec ${pkgs.bun}/bin/bun dev "$@"
+            '';
+          in
+          pkgs.mkShell {
             packages = with pkgs; [
               bun
               nodejs_20
               pkg-config
               openssl
               git
+              kilo
             ];
+            shellHook = ''
+              export KILO_ROOT="$PWD"
+            '';
           };
       });