Option to just install the service (configure no peers)

I would like to just install WG service, and then switch to some other tool to configure my peers.

Currently my installation looks like this:
```sh
...
* Applying /usr/lib/sysctl.d/10-pve-ct-inotify-limits.conf ...
* Applying /usr/lib/sysctl.d/10-pve.conf ...
* Applying /usr/lib/sysctl.d/50-pid-max.conf ...
* Applying /etc/sysctl.d/98-magic-sysrq-all-fns.conf ...
* Applying /usr/lib/sysctl.d/99-protect-links.conf ...
* Applying /etc/sysctl.d/99-sysctl.conf ...
* Applying /usr/lib/sysctl.d/pve-firewall.conf ...
* Applying /etc/sysctl.d/wg.conf ...
* Applying /etc/sysctl.conf ...
fs.inotify.max_queued_events = 8388608
fs.inotify.max_user_instances = 65536
fs.inotify.max_user_watches = 4194304
vm.max_map_count = 262144
net.ipv4.neigh.default.gc_thresh3 = 8192
net.ipv6.neigh.default.gc_thresh3 = 8192
kernel.keys.maxkeys = 2000
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-filter-vlan-tagged = 0
net.ipv4.igmp_link_local_mcast_reports = 0
fs.aio-max-nr = 1048576
kernel.pid_max = 4194304
kernel.sysrq = 1
fs.protected_fifos = 1
fs.protected_hardlinks = 1
fs.protected_regular = 2
fs.protected_symlinks = 1
net.ipv4.conf.all.rp_filter = 2
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
Created symlink /etc/systemd/system/multi-user.target.wants/wg-quick@wg0.service → /lib/systemd/system/wg-quick@.service.

Client configuration

The client name must consist of alphanumeric character(s). It may also include underscores or dashes and can't exceed 15 chars.
Client name:
Client name:
Client name:
Client name: ^C
```

... so now the best I can do to avoid a peer being created is to press Ctrl-C.

I think this UX aspect could be improved with a simple prompt.