kern: implement dpc + skeleton rest of main

libraries/libmesosphere/include/mesosphere.hpp

@@ -47,6 +47,7 @@
 #include <mesosphere/kern_k_core_local_region.hpp>
 #include <mesosphere/kern_k_slab_heap.hpp>
 #include <mesosphere/kern_k_light_lock.hpp>
+#include <mesosphere/kern_k_dpc_manager.hpp>
 #include <mesosphere/kern_kernel.hpp>
 #include <mesosphere/kern_k_page_table_manager.hpp>