Device migrations, driver migrations and more (#575)

Devices/m5stack-tab5/Source/devices/tab5_headphone_detect.h

@@ -0,0 +1,6 @@
+#pragma once
+
+// Starts/stops the periodic headphone-jack detection poll (HP_DET pin on io_expander0), which
+// toggles the speaker amplifier enable pin accordingly. Called from module.cpp's start()/stop().
+void tab5_headphone_detect_start();
+void tab5_headphone_detect_stop();