Zap example

Hi @samber,

I tried using oops with zap here is my example:

func main() {
	logger, _ := zap.NewProduction()
	err := oops.
		In("repository").
		Tags("database", "sql").
		With("deneme", "mehmet").
		Errorf("could not fetch user")

	logger.Error(err.Error(), zap.Error(err))
}

{"level":"error","ts":1684233642.017879,"caller":"test-api/main.go:17","msg":"could not fetch user","error":"could not fetch user","errorVerbose":"Oops: could not fetch user\nAt: 2023-05-16 10:40:42.017789 +0000 UTC\nDomain: repository\nTags: database, sql\nContext:\n  * deneme: mehmet\nStackstrace:\nOops: could not fetch user\n  --- at test-api/main.go:15 main()\n","stacktrace":"main.main/test-api/main.go:17"}

I couldn't achieve the log structure like your example in readme, would be great if I get errorVerbose as a json.

Start with the provided Go and zap example, then compare its output with the README example. Locate the code that formats oops errors for structured logging and determine the expected JSON representation for errorVerbose; done means the requested structure is produced and covered by the project's relevant tests, though no specific files or tests are named in the issue.