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/dprompt.bash-completion

@@ -0,0 +1,22 @@
+# bash completion for dprompt
+# shellcheck shell=bash
+_dprompt() {
+	local cur=${COMP_WORDS[COMP_CWORD]}
+	if ((COMP_CWORD == 1)); then
+		mapfile -t COMPREPLY < <(compgen -W "list show apply reset help" -- "$cur")
+		return
+	fi
+	case ${COMP_WORDS[1]} in
+	show | apply)
+		if [[ $cur == -* ]]; then
+			mapfile -t COMPREPLY < <(compgen -W "--system --script" -- "$cur")
+		else
+			local presets
+			presets=$(ls /usr/share/das/prompt/presets 2>/dev/null | sed 's/\.json$//')
+			mapfile -t COMPREPLY < <(compgen -W "$presets" -- "$cur"; compgen -f -X '!*.json' -- "$cur")
+		fi
+		;;
+	reset) mapfile -t COMPREPLY < <(compgen -W "--system" -- "$cur") ;;
+	esac
+}
+complete -F _dprompt dprompt