Terminal: Das prompt, dprompt and dbanner (0.9.1)

- das-shell 0.1.0: the Das two-line bash prompt by default (replaces the
  PS1 of Void's skel .bashrc once), dprompt (Textual prompt builder with
  presets and live preview) and dbanner (SSH login banner editor: canvas
  tools, fields with values, widgets, das-banner service for cached ones,
  Das OS logo and tryzub pictures). Python tests in make test.
- das-server 0.3.0 depends on das-shell; the server installer mentions
  dprompt and dbanner; the desktop image includes it.
- run-qemu.sh forwards the guest's SSH to localhost:2222.
- Hardware fixes: Ventoy menu icon, boot menu titles "Das OS <version>".

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

srcpkgs/das-shell/files/share/banner/widgets/fail2ban.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# dbanner-title-uk: Заблоковані fail2ban адреси
+# dbanner-title-en: Addresses banned by fail2ban
+# dbanner-mode: cached
+# dbanner-interval: 300
+# How many addresses fail2ban keeps banned now and in total; needs root.
+. "${0%/*}/lib.sh"
+command -v fail2ban-client >/dev/null || exit 0
+((EUID == 0)) || exit 0
+out=$(timeout 5 fail2ban-client status sshd 2>/dev/null) || exit 0
+now=$(awk -F: '/Currently banned/ {gsub(/ /, "", $2); print $2}' <<<"$out")
+total=$(awk -F: '/Total banned/ {gsub(/ /, "", $2); print $2}' <<<"$out")
+echo "$Bold$(say "fail2ban (sshd):" "fail2ban (sshd):")$Off $Yellow${now:-0}$Off $(say "заблоковано зараз, усього" "banned now, total") ${total:-0}"