Change dark theme packaging steps in build script

Seems the behaviour for zip differs between
Fedora (host test machine) and Ubuntu (GitHub workflow machine).
This should be the actual fix for the previous two commits.

Author: Deletecat

build.sh

@@ -77,9 +77,11 @@ r4denc -k 0x4002 kernel/wood_r4xx.nds out/ex4ds/wood.dat
 cp out/ex4ds/_ds_menu.dat out/ex4ds/_dsmenu.dat
 
 # package optional dark theme
-mkdir out/aos_dark_theme
-cd aos_dark_theme
-zip -Z store -r ../out/aos_dark_theme/theme.res {calendar,icon,icons.bmp,logo.bmp,version}
-cp setting.ini ../out/aos_dark_theme/setting.ini
+mkdir -p out/aos_dark_theme/theme
+cd out/aos_dark_theme/theme
+cp -r ../../../aos_dark_theme/* .
+mv setting.ini ../setting.ini
+zip -Z store -r ../theme.res *
 cd ..
-
+rm -rf theme
+cd ../..