Add support for setting interface name and wireguard port

[mlsmaycon]

Describe your changes

This PR adds support for setting the wireguard interface name and port with the netbird up command

e.g.:
Setting custom interface name:

netbird down
netbird up --interface-name utun101

Setting custom Wireguard port:

netbird down
netbird up  --wireguard-port 51822

Setting custom interface name and port with environment variables:

netbird down
export NB_INTERFACE_NAME=utun103 
export NB_WIREGUARD_PORT=52000
netbird up

Setting custom interface name and port in foreground:

sudo netbird up -F --interface-name utun101  --wireguard-port 51822

Issue ticket number and link

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)
• Extended the README / documentation, if necessary

[nazarewk]

FYI: works wonderfully keeping the configuration in sync with envvars on each start https://github.com/nazarewk-iac/nix-configs/blob/c81fae581c636786775a2e095d04913fe1c37ddc/modules/networking/netbird/default.nix#L73-L74