rename, use bmps dir for paths

Author: FoamyGuy

examples/sprite_button_tft_featherwing_simpletest.py renamed to examples/display_button_spritebutton_tft_featherwing_simpletest.py

@@ -50,8 +50,8 @@
     label="MENU",
     label_font=terminalio.FONT,
     label_color=TEXT_WHITE,
-    bmp_path="icons/gradient_button_0.bmp",
-    selected_bmp_path="icons/gradient_button_1.bmp",
+    bmp_path="bmps/gradient_button_0.bmp",
+    selected_bmp_path="bmps/gradient_button_1.bmp",
     transparent_index=0,
 )