Add a Debian package and bash completion

make deb builds dist/jarl_<version>_<arch>.deb with dpkg-deb alone (no
root), for the host or another architecture (DEB_ARCH=arm64). The package
creates the jarl user and directories and an example jarl.yaml on the
first install, restarts a running jarld on upgrades, never touches
/etc/jarl/jarl.yaml, stops jarld on removal, and keeps Jarl's data even
on purge.

make install and the package install bash completion for jarl and jarld.
Besides commands and flags it completes server and group names from the
CLI configuration, zone, view, ACL, TSIG key and user names from the
server, and record types. make dist includes the completion scripts.

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

deploy/debian/control.in

@@ -0,0 +1,20 @@
+Package: jarl
+Version: @VERSION@
+Architecture: @ARCH@
+Maintainer: @MAINTAINER@
+Installed-Size: @SIZE@
+Depends: systemd
+Recommends: bind9 (>= 1:9.20)
+Section: net
+Priority: optional
+Description: web UI, REST API and CLI for managing a BIND 9 server
+ Jarl manages a BIND 9.20 server: zones, records, views, ACLs, TSIG keys
+ and options, through a web UI, a REST API and the jarl command line
+ client. Every change is validated, checked with named-checkconf and
+ loaded into named as one changeset that can be reverted. Users and API
+ tokens have fine-grained permissions, and every change is audited.
+ .
+ The package installs jarld (the daemon, as the systemd service jarl) and
+ jarl (the CLI), with bash completion for both. jarld isn't started on a
+ first install: see /usr/share/doc/jarl/docs/install.md to create the
+ database and adopt the BIND configuration.