Enable source debugging feature for windows platform (#910)

- use platform independent data types in debug-engine library
- add os_socket APIs and provide windows and posix implementation
- avoid using platform related header files in non-platform layer
- use format specifiers macros for sprintf and sscanf
- change thread handle type from uint64 to korp_tid
- add lock when sending socket packet to avoid thread racing

core/iwasm/libraries/debug-engine/packets.h

@@ -6,8 +6,6 @@
 #ifndef PACKETS_H
 #define PACKETS_H
 
-#include <stdint.h>
-#include <unistd.h>
 #include "gdbserver.h"
 
 bool