start to add some SOUND_TRIGGER_ACHIEVEMENTS code

Start to add supporting code to windsound and macsound. The latter
remains commented out because I haven't had a chance to try
it on macOS yet.

In order to test it out, I added two more stock sounds:
sa2_xplevelup and sa2_xpleveldown.

sound/wav/attributions.txt

@@ -149,4 +149,24 @@ Description of modifications made to the original:
 - .572 seconds
 
 
+File: sa2_xplevelup.wav
+Source:   https://freesound.org/people/UsuarioLeal/sounds/446464/
+Original: download/446464__usuarioleal__21-xilofono.wav
+By:       https://freesound.org/people/UsuarioLeal/
+License:  http://creativecommons.org/publicdomain/zero/1.0/
+Download Date: February 4, 2023
+Description of modifications made to the original:
+- No changes
+- 1.204 seconds
 
+
+File: sa2_xpleveldown.wav
+Source:   https://freesound.org/people/Casonika/sounds/546734/download/
+Original: 546734__casonika__violin-pluck-starting-c2-fast-descending-effect.wav
+By:       https://freesound.org/people/Casonika/
+License:  https://creativecommons.org/licenses/by/4.0/
+Download Date: February 4, 2023
+Description of modifications made to the original:
+- 00h00m02.182s to 00h00m03.008s as selection.
+- Saved selection to file named sa2_xpleveldown.wav
+- .826 seconds

sound/wav/uu2wav.cmd

@@ -63,6 +63,8 @@ set UU=..\..\util\uudecode.exe
 %UU% sound_Wooden_Harp_E.uu
 %UU% sound_Wooden_Harp_F.uu
 %UU% sound_Wooden_Harp_G.uu
+%UU% sa2_xpleveldown.uu
+%UU% sa2_xplevelup.uu
 
 set UU=
 

sound/wav/uu2wav.sh

@@ -60,4 +60,6 @@ uudecode sound_Wooden_Harp_D.uu
 uudecode sound_Wooden_Harp_E.uu
 uudecode sound_Wooden_Harp_F.uu
 uudecode sound_Wooden_Harp_G.uu
+uudecode sa2_xpleveldown.uu
+uudecode sa2_xplevelup.uu