feature(gnuradio): add gnuradio-companion with osmocom extension

modules/nixos/gnuradio.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # install gnuradio companion along with it's osmocom library
+  environment.systemPackages = with pkgs; [
+    (gnuradio.override {
+      extraPackages = with gnuradio.pkgs; [ osmosdr ];
+    })
+    hackrf
+  ];
+}