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

* feat: add nix support(#80)

* chore: nix flake update

* update actions

nix/README.md

@@ -0,0 +1,40 @@
+# Nix Flake Usage
+
+## run
+
+```bash
+nix run github:feschber/lan-mouse
+
+# with params
+nix run github:feschber/lan-mouse -- --help
+
+```
+
+## home-manager module
+
+add input
+
+```nix
+inputs = {
+    lan-mouse.url = "github:feschber/lan-mouse";
+}
+```
+
+enable lan-mouse
+
+``` nix
+{
+  inputs,
+  ...
+}: {
+  # add the home manager module
+  imports = [inputs.lan-mouse.homeManagerModules.default];
+
+  programs.lan-mouse = {
+    enable = true;
+    # systemd = false;
+    # package = inputs.lan-mouse.packages.${pkgs.stdenv.hostPlatform.system}.default
+  };
+}
+
+```