[docs]: add contribuing guide and add hooks install (#1613)

* [feat]: update kt-kernel hooks and add contribution guide

* [docs]: add contributing guide
* [style]: format the python file and cpp file in kt-kernel

kt-kernel/cpu_backend/shared_mem_buffer.cpp

@@ -9,10 +9,10 @@
  **/
 #include "shared_mem_buffer.h"
 
+#include <errno.h>
 #include <numa.h>
 
 #include <cstdio>
-#include <errno.h>
 
 size_t MemoryRequest::total_size() {
   size_t total = 0;