feat(anaconda): add hostname field to user spoke and fix keyboard layout by territory

Replace keyboard correction logic in kickstart with anaconda package patches:

- Add "Nom de machine" (hostname) field to the User spoke in anaconda GUI
- user.py writes the hostname value to /tmp/fws-hostname for the kickstart %post
- Simplify kickstart to read from /tmp/fws-hostname instead of live hostname
- Fix keyboard layout selection to use full locale (e.g. fr_CH) instead of just language (fr)
  to correctly derive territory-specific keymaps (ch(fr) for Switzerland, not fr for France)
- Remove outdated fix_keyboard() function from kickstart

Also add --network=host flag to podman run in setup-aur.sh to ensure DNS and internet
connectivity through the host stack instead of the bridge (fixes timeout issues on
certain networks with firewalld/NAT).

Bump anaconda pkgrel from 2 to 4.

setup-aur.sh

@@ -114,7 +114,10 @@ if [ -z "$FWS_IN_CONTAINER" ] && ! host_is_arch; then
     "${SUDO[@]}" podman pull "$IMAGE"
 
     info "Relance dans le conteneur (setup-aur.sh)…"
-    "${SUDO[@]}" podman run --rm "${TTY[@]}" --privileged \
+    # --network=host : le bridge podman ne route plus vers l'extérieur sur
+    # certains réseaux (firewalld/NAT, → « Resolving timed out »). On partage la
+    # pile réseau de l'hôte (internet + DNS OK) pour les pacman/makepkg/AUR.
+    "${SUDO[@]}" podman run --rm "${TTY[@]}" --network=host --privileged \
         -e FWS_IN_CONTAINER=1 \
         -v "$REPO_DIR":"$REPO_DIR" \
         -v fws-pacman-cache:/var/cache/pacman/pkg \