added game.h player.h and uart.h, implemented game objects

src/uart.h

@@ -0,0 +1,24 @@
+#ifndef UART_H
+#define UART_H
+
+#include<stdint.h>
+#include<stdlib.h>
+#include<stdbool.h>
+
+typedef struct uart_message_s{
+    uint16_t message_length;
+    uint8_t *message_data;
+
+    // Internal, do not touch!
+    bool __deleted;     
+} uart_message_t;
+
+void uart_init(void);
+void uart_transmit(uart_message_t *message);            // transmit a message and frees it
+bool uart_has_message(void);                            // checks if there is at least one msg available
+void uart_message_free(uart_message_t *message);        // frees a message
+
+uart_message_t *uart_message_allocate(void);            // allocate storage for a new message
+uart_message_t *receive_message(void);                  // returns a message if available else null
+
+#endif /* UART_H */