Added I2C address scan

include/sta/bus/i2c/i2c.hpp

@@ -35,6 +35,11 @@ namespace sta
          */
         void setSettings(uint16_t address, bool master, bool blocking);
 
+        /**
+         * @brief Prints all available addresses via the debug printable.
+         * 
+         */
+        virtual void scanAddresses() = 0;
     protected:
     	/// @brief The peripheral's address to communicate with.
     	uint16_t address_;