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/profiledef.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+# TANINUX (camel) archiso profile — overrides releng's profiledef.sh.
+# shellcheck disable=SC2034
+iso_name="taninux"
+iso_label="TANINUX_$(date +%Y%m)"
+iso_publisher="TANINUX <https://taninux.kgva.ch>"
+iso_application="TANINUX (camel) — niri/eww desktop · live + Calamares installer"
+iso_version="$(date +%Y.%m.%d)"
+install_dir="tanin"
+buildmodes=('iso')
+bootmodes=('bios.syslinux.mbr' 'bios.syslinux.eltorito'
+           'uefi-x64.systemd-boot.esp' 'uefi-x64.systemd-boot.eltorito')
+arch="x86_64"
+pacman_conf="pacman.conf"
+airootfs_image_type="squashfs"
+airootfs_image_tool_options=('-comp' 'zstd' '-Xcompression-level' '19' '-b' '1M')
+bootstrap_tarball_compression=('zstd' '-c' '-T0' '--auto-threads=logical' '--long' '-19')
+file_permissions=(
+  ["/etc/shadow"]="0:0:400"
+  ["/etc/gshadow"]="0:0:400"
+  ["/root"]="0:0:750"
+  ["/root/customize_airootfs.sh"]="0:0:755"
+  ["/usr/local/bin/tanin-installer"]="0:0:755"
+)