feat: add flake support

adam-gui/default.nix

@@ -1,53 +0,0 @@
-{ lib, config, pkgs, ... }:
-let 
-    libs = with pkgs; [
-    libGL pkg-config xorg.libX11.dev xorg.libXcursor xorg.libXi xorg.libXinerama xorg.libXrandr xorg.libXxf86vm
-  ];
-
-in
-{
-  environment.systemPackages = with pkgs; [(buildGoModule rec {
-  pname = "adam-gui";
-  version = "0.0.1";
-
-  buildInputs = [ gcc go ] ++ libs;
-
-  nativeBuildInputs = with pkgs; [ pkg-config addOpenGLRunpath makeWrapper ];
-
-  subPackages = [ "." ];
-
-  src = fetchFromGitea {
-    domain = "git.ontake.dev";
-    owner = "go";
-    repo = "adam-gui";
-    rev = "a64eabcfd4a85d2a3fe3e88c8f668af2c4db741d";
-    hash = "sha256-igJie5yYj7LndBGd5XA7GU0qWalrK5j+YM0hCFunXVY=";
-  };
-
-  vendorHash = null;
-
-  meta = with lib; {
-    description = "A simple GUI for ADAM branded scales";
-    homepage = "https://git.ontake.dev/go/adam-gui";
-    license = licenses.gpl3;
-    maintainers = [ ];
-    platforms = platforms.linux;
-  };
-
-  postInstall = ''
-      wrapProgram "$out/bin/adam-gui" \
-      --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath libs}
-    '';
-
-    postFixup = ''
-      addOpenGLRunpath $out/bin/adam-gui
-    '';
-}) (makeDesktopItem {
-            name = "ADAM GUI";
-            desktopName = "ADAM GUI";
-            exec = "adam-gui";
-            icon = "adam-gui";
-            comment = "A simple GUI for ADAM branded scales.";
-            categories = ["Science" "Utility"];
-          })];
-}