luci: luci-app-wireguard: Missing option to configure peer address

The Wireguard peer configuration section is missing the address field. I am not aware of configurations omitting the address parameter. It would be handy to set that in the peer configuration so the exported configuration as well as QR code will automatically include the parameter.

At least on Android, the Wireguard app will complain if no address is set and one has to be entered manually after scanning the QR code from the OpenWrt peer config generation page.

In case this is desired behaviour (i.e. to export configs to peers without an address and manually set it on the respective devices), please consider this issue void.

Steps to reproduce:

1. Go to: Network → Interfaces → Wireguard → Edit → Peers tab → Edit a peer

Actual behavior:

1. The option to set the address parameter is not present
2. As a result, the generated peer config does not contain any address parameter

Expected behavior:

1. An option to set the address parameter for a peer in the peer configuration settings
2. The address parameter is included in the generated peer configs (text and QR code)

Additional Information:

DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='22.03.1'
DISTRIB_REVISION='r19777-2853b6d652'
DISTRIB_TARGET='rockchip/armv8'
DISTRIB_ARCH='aarch64_generic'
DISTRIB_DESCRIPTION='OpenWrt 22.03.1 r19777-2853b6d652'
DISTRIB_TAINTS=''