Fonts + kitty config in the desktop

- tanin-eww: ship Fuji kitty.conf into skel (~/.config/kitty)
- add missing font deps to tanin-eww + tanin-desktop:
  ttc-iosevka-aile (bar's 'Iosevka Aile' UI font) + ttf-nerd-fonts-symbols
  ('Symbols Nerd Font' icon fallback). ttf-iosevka-nerd covers kitty.
- start archiso profile under iso/ (releng-base + overrides; systemd-boot,
  btrfs+snapshots, plymouth, linux-zen, Calamares clone-install)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

iso/overrides/airootfs/root/.bash_profile

@@ -0,0 +1,6 @@
+# Live ISO: on the first console (tty1), launch the TANINUX installer.
+# (On an installed system this file isn't present — Calamares' shellprocess
+#  strips the live-only bits from the target.)
+if [[ "$(tty)" == /dev/tty1 ]] && [[ -z "${WAYLAND_DISPLAY:-}" ]] && ! pgrep -x cage >/dev/null 2>&1; then
+  exec tanin-installer
+fi