Implement Hooks per #726

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

@@ -0,0 +1,16 @@
+package App::Netdisco::Worker::Plugin::Hook;
+
+use Dancer ':syntax';
+use App::Netdisco::Worker::Plugin;
+use aliased 'App::Netdisco::Worker::Status';
+
+register_worker({ phase => 'check' }, sub {
+  my ($job, $workerconf) = @_;
+
+  return Status->error('can only run a specific hook')
+    unless $job->action eq 'hook' and defined $job->only_namespace;
+
+  return Status->done('Hook is able to run.');
+});
+
+true;