refactor: Move recipe generator to cook/ directory and fix flattening bugs

- Move recipe-generator/ to cook/ for cleaner structure

- Fix ksflatten-relative path conversion to handle all %include paths

- Fix validation exit code to only fail on actual errors

- All recipes now generate and flatten successfully via make all

cook/ingredients/initial-setup/desktop/config.ks

@@ -0,0 +1,9 @@
+# Desktop initial-setup configuration
+
+firstboot --enable # Enable the Setup Agent to start at boot time
+
+%packages --exclude-weakdeps
+
+initial-setup
+
+%end

cook/ingredients/initial-setup/generic-wayland/config.ks

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+# Initial setup - generic wayland desktop mode
+
+firstboot --enable # Initial Setup will start after the first reboot
+
+%packages --exclude-weakdeps # Beginning of the packages section. Excludes weak package dependencies.
+
+# TO BE TESTED -> initial-setup-gui # Graphical user interface for the initial-setup utility
+# TO BE TESTED -> initial-setup-gui-wayland-generic.x86_64 # Run the initial-setup GUI in Wayland
+gnome-initial-setup # Add GNOME initial setup too to let user create local account.
+
+%end # End of the packages section

cook/ingredients/initial-setup/gnome/config.ks

@@ -0,0 +1,25 @@
+# Initial setup - GNOME desktop mode
+
+firstboot --enable # Initial Setup will start after the first reboot
+
+%packages --exclude-weakdeps # Beginning of the packages section. Excludes weak package dependencies.
+
+# TO BE TESTED -> initial-setup-gui # Graphical user interface for the initial-setup utility
+# TO BE TESTED -> initial-setup-gui-wayland-generic.x86_64 # Run the initial-setup GUI in Wayland
+gnome-initial-setup # Add GNOME initial setup too to let user create local account.
+
+%end # End of the packages section
+
+# %post --nochroot --log=/mnt/sysimage/root/initial-setup-gnome.log # Beginning of %post section. Those commands are executed outside the chroot environment. Add logging.
+# 
+# truncate -s 0 /mnt/sysimage/usr/share/gnome-initial-setup/vendor.conf # remove content of vendor.conf so that all options are made available
+# 
+# ## Append lines to existing vendor.conf file, so that options are skipped upon reboot
+# cat >> /mnt/sysimage/usr/share/gnome-initial-setup/vendor.conf<< EOF
+# [pages]
+# skip=privacy
+# [goa]
+# providers=local-first!
+# EOF
+# 
+# %end # End of the %post section

cook/ingredients/initial-setup/server/config.ks

@@ -0,0 +1,9 @@
+# Initial setup - server mode
+
+firstboot --enable --reconfig # Enable the Setup Agent to start at boot time in reconfiguration mode. This mode enables the language, mouse, keyboard, root password, security level, time zone, and networking configuration options in addition to the default ones
+
+%packages --exclude-weakdeps # Beginning of the packages section. Excludes weak package dependencies.
+
+initial-setup # Initial setup package
+
+%end # End of the packages section