AMiRo-OS

Add a getter function in the core for the event mask to check in the main function of the node if the core event is redefined

Do some work for the node:
Fixed some Todos in main function
Fixed error in the struct in the header file

Fixed Todo:
Use Previously defined event flag for broadcasting a control event

Finished some todos in functions of the core
(mutex lock, broadcast control event, increment/check node's stage value)

Finished core init function