feat: add initial modules

packages/ggman.nix

@@ -0,0 +1,36 @@
+{ nixpkgs-master, system, ... }:
+
+let
+  nixpkgs = nixpkgs-master;
+  pkgs = import nixpkgs { inherit system; };
+  version = "e24855c";
+in
+pkgs.buildGoModule.override
+  {
+    go = pkgs.go_1_26;
+  }
+  {
+    pname = "ggman";
+    inherit version;
+
+    src = pkgs.fetchFromGitHub {
+      owner = "tkw1536";
+      repo = "ggman";
+      rev = version;
+      sha256 = "sha256-H78xtF7l5joX3/qDFaRIT4LyZpHmm6DMR4JIKzNO7c0=";
+    };
+
+    vendorHash = "sha256-w8NrOt0xtn+/gugJ4amzdJP70Y5KHe5DlhsEprycm3U=";
+    subPackages = [ "cmd/ggman" ];
+
+    ldflags = [
+      "-X go.tkw01536.de/ggman.buildVersion=${version}"
+    ];
+
+    meta = {
+      description = "Manager for all your local git repositories";
+      homepage = "https://github.com/tkw1536/ggman";
+      license = pkgs.lib.licenses.mit;
+      maintainers = [ ];
+    };
+  }