Add commands for DIGIO channels to profile parser and add base construct to the profile interpreter

stm-firmware/include/reflow-controller/temp-profile/temp-profile-parser.h

@@ -41,6 +41,9 @@ enum pl_command_type {
 	PL_LOUDSPEAKER_SET, /**< @brief Set the loudspeaker/beeper */
 	PL_OFF, /**< @brief Disable the temperature output and shutdown the PID controller */
 	PL_CLEAR_FLAGS, /**< @brief Try clear all flags */
+    PL_DIGIO_CONF, /**< @brief Configure a DIGIO pin */
+    PL_DIGIO_SET, /**< @brief Set a DIGIO pin */
+    PL_DIGIO_WAIT, /**< @brief Wait until a DIGIO pin is set to the specified level */
 	_PL_NUM_CMDS, /**< @brief Sentinel to determine the total amount of commands */
 };