kern: mostly implement KThread::Initialize

libraries/libvapours/include/vapours/results/svc_results.hpp

@@ -27,6 +27,8 @@ namespace ams::svc {
 
     R_DEFINE_ERROR_RESULT(NotImplemented,               33);
 
+    R_DEFINE_ERROR_RESULT(NoSynchronizationObject,      57);
+
     R_DEFINE_ERROR_RESULT(ThreadTerminating,            59);
 
     R_DEFINE_ERROR_RESULT(NoEvent,                      70);