Implement LVGL with SDL for simulator (#16)

* Implemented LVGL with SDL for simulator

* cleanup

* added SDL to build

* build fix

* mutex fixes

* sim app cleanup and improvements

* docs updated

* fix for sdl?

* fix for SDL cmake setup

tactility-esp/src/graphics_i.h

@@ -1,13 +1,13 @@
 #pragma once
 
 #include "graphics.h"
-#include "hardare.h"
+#include "hardware.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-Lvgl tt_graphics_init(Hardware _Nonnull* hardware);
+Lvgl tt_graphics_init(Hardware* hardware);
 
 #ifdef __cplusplus
 }