[Feature Request] <Can you add logging to JSON format, please?>

Hi! Thanks for this great project! Can you add JSON to log formats?
It can be useful for sending logs to SIEM/Elasticsearch etc for machine parsing, while still beeng human readable.

Using Elastic Common Schema and/or Common Event Format fields' names when possible would be great.

For example:
{"ECS.Base.Timestamp":"2023-05-23T13:06:01.704054+03:00", "ECS.Host.Hostname":"firewall", "ECS.Process.Name":"opensnitch", "ECS.Event.Action":"always-deny-incoming-avahi-daemon", "CEFX.DeviceInboundInterface":"eth1", "CEFX.DeviceOutboundInterface":"", "ECS.Source.MAC":"01:00:5e:00:00:fb", "ECS.Destination.MAC":"b6:0b:e5:ed:e3:3c", "MAC_PROTO":"08:00", "ECS.Source.Address":"192.168.3.195", "ECS.Destination.Address":"224.0.0.251", "LEN":"145", "TOS":"0x00", "PREC":"0x00", "TTL":"255", "ECS.Event.ID":"14262", "ip_flags":"", "ECS.Network.Transport":"UDP", "ECS.Source.Port":"5353", "ECS.Destination.Port":"5353", "UDP-LEN":"125"}

### Summary: Please, add logging in JSON format