chore: add nix development environment

Signed-off-by: suin <[email protected]>

Author: suin

flake.lock

@@ -0,0 +1,36 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    kclpkgs.url = "github:appthrust/kcl-nix/09645bef8b60aef2f32c17676fbafd7f64b0e5a3";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, kclpkgs }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+        kcl = kclpkgs.default.${system};
+        tools = with pkgs; [
+            kcl.cli
+            kcl.language-server
+          ] ++ (with pkgs-2405; [ ]);
+      in
+      {
+        # Support for IDEs
+        # `nix profile install` installs to ~/.nix-profile/bin, so you can use tools outside of /workspace.
+        # This allows VS Code or JetBrains IDE processes to start outside of /workspace.
+        defaultPackage = pkgs.symlinkJoin {
+          name = "workspace-tools";
+          paths = tools;
+        };
+        devShells.default = pkgs.mkShell {
+          buildInputs = tools;
+          shellHook = ''
+          '';
+        };
+        formatter = pkgs.nixpkgs-fmt;
+      }
+    );
+}