Merge develop into main (#167)

- WiFi Connect app is now hidden by default, but accessible at the bottom of the WiFi Manage app when WiFi is turned on.
- WiFi service now turns on WiFi when calling connect() and WiFi is not on.
- Removed `blocking` option for `service::loader::startApp()`. This feature was unused and complex.
- Various apps: Moved private headers into Private/ folder.
- Various apps: created start() function for easy starting.
- Added documentation to all TactilityC APIs
- Refactored various `enum` into `class enum`
- Refactor M5Stack `initBoot()` (but VBus is still 0V for some reason)

TactilityHeadless/Source/hal/Power.h

@@ -11,11 +11,11 @@ public:
     Power() = default;
     virtual ~Power() = default;
 
-    enum MetricType {
-        IS_CHARGING, // bool
-        CURRENT, // int32_t, mAh - battery current: either during charging (positive value) or discharging (negative value)
-        BATTERY_VOLTAGE, // uint32_t, mV
-        CHARGE_LEVEL, // uint8_t [0, 100]
+    enum class MetricType {
+        IsCharging, // bool
+        Current, // int32_t, mAh - battery current: either during charging (positive value) or discharging (negative value)
+        BatteryVoltage, // uint32_t, mV
+        ChargeLevel, // uint8_t [0, 100]
     };
 
     union MetricData {