Tactility modules refactored (#13)

* refactor modules

* moved esp_lvgl_port to libs/

* added missing file

* fix for sim build

* various sim/pc fixes

* lvgl improvements

* added missing cmake files

libs/lvgl/examples/styles/lv_example_style_1.c

@@ -0,0 +1,31 @@
+#include "../lv_examples.h"
+#if LV_BUILD_EXAMPLES && LV_USE_IMG
+
+/**
+ * Using the Size, Position and Padding style properties
+ */
+void lv_example_style_1(void)
+{
+    static lv_style_t style;
+    lv_style_init(&style);
+    lv_style_set_radius(&style, 5);
+
+    /*Make a gradient*/
+    lv_style_set_width(&style, 150);
+    lv_style_set_height(&style, LV_SIZE_CONTENT);
+
+    lv_style_set_pad_ver(&style, 20);
+    lv_style_set_pad_left(&style, 5);
+
+    lv_style_set_x(&style, lv_pct(50));
+    lv_style_set_y(&style, 80);
+
+    /*Create an object with the new style*/
+    lv_obj_t * obj = lv_obj_create(lv_scr_act());
+    lv_obj_add_style(obj, &style, 0);
+
+    lv_obj_t * label = lv_label_create(obj);
+    lv_label_set_text(label, "Hello");
+}
+
+#endif