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_5.py

@@ -0,0 +1,22 @@
+#
+# Using the Shadow style properties
+#
+
+style = lv.style_t()
+style.init()
+
+# Set a background color and a radius
+style.set_radius(5)
+style.set_bg_opa(lv.OPA.COVER)
+style.set_bg_color(lv.palette_lighten(lv.PALETTE.GREY, 1))
+
+# Add a shadow
+style.set_shadow_width(8)
+style.set_shadow_color(lv.palette_main(lv.PALETTE.BLUE))
+style.set_shadow_ofs_x(10)
+style.set_shadow_ofs_y(20)
+
+# Create an object with the new style
+obj = lv.obj(lv.scr_act())
+obj.add_style(style, 0)
+obj.center()