Add some scifi-ish GUI sounds

mods/hades_player/README.txt

@@ -10,3 +10,8 @@ Amatvejuk721 (CC BY 3.0):
   hades_player_death.ogg (changes were made)
   hades_player_respawn.ogg (changes were made)
   Origin: <https://freesound.org/people/Amatvejuk721/sounds/171050/>
+
+rubberduck (CC0 1.0):
+  hades_player_gui_button.ogg
+  hades_player_gui_tab.ogg
+  Origin: <https://opengameart.org/content/50-cc0-sci-fi-sfx>

mods/hades_player/init.lua

@@ -104,7 +104,11 @@ minetest.register_on_joinplayer(function(player)
 	player:hud_set_hotbar_itemcount(10)
 	player:hud_set_hotbar_image("hades_gui_hotbar.png")
 	player:hud_set_hotbar_selected_image("hades_gui_hotbar_selected.png")
-	player:set_formspec_prepend("listcolors[#000000;#C68D3C;#ffffff;#C68D3C;#000000]")
+	player:set_formspec_prepend(
+[=[listcolors[#000000;#C68D3C;#ffffff;#C68D3C;#000000]
+style_type[*;sound=hades_player_gui_button]]
+style_type[tabheader;sound=hades_player_gui_tab]]
+style_type[dropdown;sound=hades_player_gui_tab]]=])
 end)
 
 minetest.register_on_leaveplayer(function(player)