Add scummvm manifest and icon

recipes/scummvm/manifest

+name=ScummVM
+category=Games
+binary=/bin/scummvm
+icon=/ui/icons/apps/scummvm.png

recipes/scummvm/recipe.sh

@@ -33,5 +33,12 @@ function recipe_clean {
 function recipe_stage {
     dest="$(realpath $1)"
     "$REDOX_MAKE" DESTDIR="$dest" install
+
+    mkdir -pv "$1/ui/apps"
+    cp -v "${COOKBOOK_RECIPE}/manifest" "$1/ui/apps/scummvm"
+
+    mkdir -pv "$1/ui/icons/apps"
+    cp -v "${COOKBOOK_RECIPE}/icon.png" "$1/ui/icons/apps/scummvm.png"
+
     skip=1
 }