Put a bit of order in the src directory, group and name things appropriately

src/platform/esp32/CallbackCharacteristic.h

@@ -0,0 +1,12 @@
+#pragma once
+#include "BLECharacteristic.h"
+#include "PowerFSM.h" // FIXME - someday I want to make this OTA thing a separate lb at at that point it can't touch this
+
+/**
+ * A characterstic with a set of overridable callbacks
+ */
+class CallbackCharacteristic : public BLECharacteristic, public BLECharacteristicCallbacks
+{
+  public:
+    CallbackCharacteristic(const char *uuid, uint32_t btprops) : BLECharacteristic(uuid, btprops) { setCallbacks(this); }
+};