Builtin/../item: Enable tool breaking sounds

If a tool wears out and is destroyed, it's itemstack count
goes to 0, and we can optionally play a breaking sound.

This patch implements playing a breaking sound when this
occurs. Sounds need to be added to the tool itemdef
registration as the sound name string in the .sound.breaks
member.

doc/lua_api.txt

@@ -3606,6 +3606,7 @@ Definition tables
           actual result to client in a short moment.
         ]]
         sound = {
+            breaks = "default_tool_break", -- tools only
             place = --[[<SimpleSoundSpec>]],
         },