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/desktop/gnome/packages.ks

@@ -0,0 +1,51 @@
+#            __          ____                        ____  _____
+#     ____  / /_  __  __/ / /___  ____ ___  ___     / __ \/ ___/
+#    / __ \/ __ \/ / / / / / __ \/ __ `__ \/ _ \   / / / /\__ \
+#   / /_/ / / / / /_/ / / / /_/ / / / / / /  __/  / /_/ /___/ /
+#  / .___/_/ /_/\__, /_/_/\____/_/ /_/ /_/\___/   \____//____/
+# /_/          /____/
+
+# GNOME desktop packages
+
+%packages --exclude-weakdeps # Beginning of the packages section. Excludes weak package dependencies
+
+@base-graphical
+## provides the following as mandatory packages:
+# mesa-dri-drivers
+# mesa-vulkan-drivers
+# plymouth-system-theme
+
+# @critical-path-gnome not using this group but hand-picking packages 
+## Mandatory packages found in hidden `@critical-path-gnome` group (`dnf group info --hidden critical-path-gnome`)
+## Not using 
+## provides the following as mandatory packages:
+bash-color-prompt # Color prompt for bash shell
+dconf # A configuration system
+gdm # The GNOME Display Manager
+# gnome-classic-session # GNOME "classic" mode session
+gnome-control-center # Utilities to configure the GNOME desktop
+# gnome-initial-setup # Bootstrapping your OS
+gnome-shell # Window management and application launching for GNOME
+gvfs-fuse # FUSE support for gvfs
+# ptyxis # A container oriented terminal for GNOME
+### and the following as default packages
+# NetworkManager-pptp # NetworkManager VPN plugin for PPTP
+# avahi # Local network service discovery
+# gnome-bluetooth # Bluetooth graphical utilities
+gnome-session-wayland-session # Desktop file for wayland based gnome session
+# gnome-software # A software center for GNOME
+nautilus # File manager for GNOME
+# toolbox # Tool for interactive command line environments on Linux
+
+## Extra hand-picked packages
+gnome-backgrounds.noarch # wallpapers from the GNOME project
+gnome-terminal # Terminal emulator for GNOME
+dejavu-sans-mono-fonts # the gnome-shell package doesn't include much fonts by default, resulting in weird spacings in GNOME Terminal. GNOME Terminal unfortunately doesn't automatically pick this font 
+firefox # Mozilla Firefox Web browser
+mozilla-ublock-origin.noarch # An efficient blocker for Firefox
+
+pipewire-alsa # PipeWire media server ALSA support
+pipewire-pulseaudio # PipeWire PulseAudio implementation
+pipewire-jack-audio-connection-kit # PipeWire JACK implementation
+
+%end # End of the packagages section