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)

TactilityCore/Source/Thread.h

@@ -122,17 +122,22 @@ public:
     void start();
 
     /** Join Thread
-     * @warning Use this method only when CPU is not busy (Idle task receives control), otherwise it will wait forever.
+     * @warning make sure you manually interrupt any logic in your thread (e.g. by an EventFlag or boolean+Mutex)
+     * @param[in] timeout the maximum amount of time to wait
+     * @param[in] pollInterval the amount of ticks to wait before we check again if the thread is finished
      * @return success result
      */
-    bool join();
+    bool join(TickType_t timeout = portMAX_DELAY, TickType_t pollInterval = 10);
 
     /** Get FreeRTOS ThreadId for Thread instance
      * @return ThreadId or nullptr
      */
     ThreadId getId() const;
 
-    /** @return thread return code */
+    /**
+     * @warning crashes when state is not "stopped"
+     * @return thread return code
+     */
     int32_t getReturnCode() const;
 
 private: