feat: init nix flake

flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Super cool desktop shell for Hyprland!";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    astal = {
+      url = "github:aylur/astal";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    ags = {
+      url = "github:aylur/ags";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.astal.follows = "astal";
+    };
+  };
+
+  outputs =
+    inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      perSystem =
+        {
+          config,
+          self',
+          inputs',
+          pkgs,
+          system,
+          ...
+        }:
+        let
+          colorshell = pkgs.callPackage ./nix/package.nix { inherit inputs'; };
+        in
+        {
+          packages = {
+            inherit colorshell;
+            default = colorshell;
+          };
+
+          devShells = import ./nix/devshell.nix { inherit self' pkgs; };
+        };
+      flake = {
+        passthru = {
+          inherit inputs;
+        };
+      };
+    };
+}