Boot splash and more (#98)

* Boot splash and more

- Added developer sdkconfig
- Refactored the way FreeRTOS includes are included
- Improved Gui/Loader logic
- Implemented boot app with splash screen

* Updated naming for Gui and Loader services

* Renamed Screenshot service methods

* Renames

* Service renames

TactilityCore/Source/RtosCompat.h

@@ -0,0 +1,13 @@
+#pragma once
+
+/**
+ * Compatibility includes for FreeRTOS.
+ * Custom FreeRTOS from ESP-IDF prefixes paths with "freertos/",
+ * but this isn't the normal behaviour for the regular FreeRTOS project.
+ */
+
+#ifdef ESP_PLATFORM
+#include "freertos/FreeRTOS.h"
+#else
+#include "FreeRTOS.h"
+#endif