Add controller button layout mappings

This adds mappings from SDL's Xbox-based SDL_GameControllerButton
constants, to glyphs for the following layouts:

- LAYOUT_NINTENDO_SWITCH_PRO,
- LAYOUT_NINTENDO_SWITCH_JOYCON_L,
- LAYOUT_NINTENDO_SWITCH_JOYCON_R,
- LAYOUT_DECK,
- LAYOUT_PLAYSTATION,
- LAYOUT_XBOX,
- LAYOUT_GENERIC,

There may still be errors in these, but they should be mostly correct.
I'm leaving it up to Ethan to make it show the correct button glyphs
for the correct controllers being connected (and possibly to fix these
mappings where needed).

desktop_version/src/VFormat.c

@@ -52,7 +52,7 @@ static inline void call_with_button(format_callback callback, void* userdata, in
     Action action;
     vformat_unbutton(&actionset, &action, vararg_value);
 
-    const char* button_text = BUTTONGLYPHS_get_button(actionset, action);
+    const char* button_text = BUTTONGLYPHS_get_button(actionset, action, -1);
     if (button_text == NULL)
     {
         callback(userdata, "[null]", 6);