support placing blocks on containers while sneaking

include/globals.h

@@ -95,6 +95,7 @@ typedef struct {
   uint8_t craft_count[9];
   // 0x01 - attack cooldown
   // 0x02 - has not spawned yet
+  // 0x04 - sneaking
   uint8_t flags;
 } PlayerData;
 

include/packets.h

@@ -49,6 +49,7 @@ int sc_systemChat (int client_fd, char* message, uint16_t len);
 int cs_interact (int client_fd);
 int sc_entityEvent (int client_fd, int entity_id, uint8_t status);
 int sc_removeEntity (int client_fd, int entity_id);
+int cs_playerInput (int client_fd);
 int sc_registries (int client_fd);
 
 #endif