chore: migrate from calamares to anaconda installer

Remove Calamares compilation and configuration, replace with Anaconda installer setup.

Changes:
- Remove Calamares-related entries from .gitignore
- Update README with migration status from Calamares to Anaconda
- Rename setup-calamares.sh references to setup-aur.sh
- Remove Calamares packages from package lists
- Add anaconda and liveimg payload packages
- Add Anaconda kickstart configuration (interactive-defaults.ks)
- Update boot sequence documentation: remove Calamares desktop selection, simplify to Openbox live environment
- Remove Calamares-specific troubleshooting entries
- Clean up .xinitrc and .zlogin to remove Calamares launcher
- Update build scripts to reference local repo generically instead of Calamares-specific

configs/baseline/airootfs/root/.zprofile

@@ -1,4 +1,4 @@
-# Démarrage automatique de Xorg + Calamares uniquement dans le live FWS.
+# Démarrage automatique de Xorg uniquement dans le live FWS.
 # Sur le système installé, /run/archiso n'existe pas, donc rien ne se lance.
 if [[ -d /run/archiso && "$(tty)" == "/dev/tty1" && -z "$DISPLAY" ]]; then
     exec startx -- vt1