Add Feature - Add NPKit Support in RCCL (#564)

* apply npkit

* fix bug

* add npkit in readme

src/include/proxy.h

@@ -58,6 +58,10 @@ struct ncclProxySubArgs {
   uint64_t end;
   void* requests[NCCL_STEPS];
   void* profilingEvents[NCCL_STEPS];
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_SEND_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_SEND_EXIT)
+  int npKitSizesFifo[NCCL_STEPS];
+#endif
 };
 
 struct ncclProxyArgs {