[Feature] Remove or rename (default) fields

[drissamri]

It would be useful if through configuration the standard fields could be removed and renamed.

For AWS Lambda the following is logged and it would be useful to remove the clutter:

“threadName”: “main”, 
“threadId”: 1, “hostName”: 
“unknown-host.unknown-domain”, 
“processName”: “lambdainternal.AWSLambda”, 
“processId”: 9,

Also being able to rename existing fields would be useful to comply with company standard level -> logLevel

[SlyngDK]

That is already part of the configuration, I have just not add documentation in the readme.
https://github.com/quarkiverse/quarkus-logging-json/blob/master/runtime/src/main/java/io/quarkiverse/loggingjson/Config.java