move nbtstat and nbtwalk to worker plugins

lib/App/Netdisco/Worker/Plugin/Nbtstat.pm

@@ -0,0 +1,21 @@
+package App::Netdisco::Worker::Plugin::Nbtstat;
+
+use Dancer ':syntax';
+use App::Netdisco::Worker::Plugin;
+use aliased 'App::Netdisco::Worker::Status';
+
+use App::Netdisco::Util::Device 'is_macsuckable';
+
+register_worker({ primary => true }, sub {
+  my ($job, $workerconf) = @_;
+
+  return Status->error('nbtstat failed: unable to interpret device param')
+    if !defined $job->device;
+
+  return Status->defer(sprintf 'nbtstat deferred: %s is not macsuckable', $job->device->ip)
+    unless is_macsuckable($job->device);
+
+  return Status->done('Nbtstat is able to run.');
+});
+
+true;