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)

TactilityC/Source/tt_message_queue.cpp

@@ -33,6 +33,10 @@ uint32_t tt_message_queue_get_count(MessageQueueHandle handle) {
     return HANDLE_TO_MESSAGE_QUEUE(handle)->getCount();
 }
 
+uint32_t tt_message_queue_get_space(MessageQueueHandle handle) {
+    return HANDLE_TO_MESSAGE_QUEUE(handle)->getSpace();
+}
+
 bool tt_message_queue_reset(MessageQueueHandle handle) {
     return HANDLE_TO_MESSAGE_QUEUE(handle)->reset();
 }