feat: yafti package group for recipe.yml

read .flatpaks[] in recipe.yml
and add declared packages to their own
package group in yafti

build.sh

@@ -10,4 +10,12 @@ done
 echo "---"
 
 # install yafti to install flatpaks on first boot, https://github.com/ublue-os/yafti
-pip install --prefix=/usr yafti
+pip install --prefix=/usr yafti
+
+# add a package group for yafti using the packages defined in recipe.yml
+yq -iy '.screens.applications.values.groups.Custom.description = "Flatpaks defined by the image maintainer"' /etc/yafti.yml
+yq -iy '.screens.applications.values.groups.Custom.default = true' /etc/yafti.yml
+flatpaks=$(yq '.flatpaks[]' < /etc/ublue-recipe.yml)
+for pkg in $flatpaks; do \
+    yq -iy ".screens.applications.values.groups.Custom.packages += [{'$pkg': '$pkg'}]" /etc/yafti.yml \
+done