feat: add nix support(#80) (#82)

* feat: add nix support(#80)

* chore: nix flake update

* update actions

nix/default.nix

@@ -0,0 +1,46 @@
+{
+  rustPlatform,
+  lib,
+  pkgs,
+}:
+rustPlatform.buildRustPackage {
+  pname = "lan-mouse";
+  version = "0.6.0";
+
+  nativeBuildInputs = with pkgs; [
+    pkg-config
+    cmake
+    buildPackages.gtk4
+  ];
+
+  buildInputs = with pkgs; [
+    xorg.libX11
+    gtk4
+    libadwaita
+    xorg.libXtst
+  ];
+
+  src = builtins.path {
+    name = "lan-mouse";
+    path = lib.cleanSource ../.;
+  };
+
+  cargoLock.lockFile = ../Cargo.lock;
+
+  cargoLock.outputHashes = {
+    "reis-0.1.0" = "sha256-sRZqm6QdmgqfkTjEENV8erQd+0RL5z1+qjdmY18W3bA=";
+  };
+
+  # Set Environment Variables
+  RUST_BACKTRACE = "full";
+
+  meta = with lib; {
+    description = "Lan Mouse is a mouse and keyboard sharing software";
+    longDescription = ''
+      Lan Mouse is a mouse and keyboard sharing software similar to universal-control on Apple devices. It allows for using multiple pcs with a single set of mouse and keyboard. This is also known as a Software KVM switch.
+      The primary target is Wayland on Linux but Windows and MacOS and Linux on Xorg have partial support as well (see below for more details).
+    '';
+    mainProgram = "lan-mouse";
+    platforms = platforms.all;
+  };
+}