feat: add zap with custom fields

[rfyiamcool]

summary

I use klog implemented by zap, but klog-zap can't input custom params.

e.g. klog can record inputed server_name and server_version ?

expect

package main

import (
    "github.com/cloudwego/kitex/pkg/klog"
    kitexzap "github.com/kitex-contrib/obs-opentelemetry/logging/zap"
)

func main() {
    klog.SetLogger(kitexzap.NewLogger(kitexzap.WithCustomFields("service_name", "kitex", "version": "v1.0.1", "tags": "cloud.k8s")))
    klog.SetLevel(klog.LevelDebug)

    ...
    ...
}

[li-jin-gou]

cc @rogerogers

[rogerogers]

LGTM

[rogerogers]

Hello, thank you very much for your PR. I've made a few minor adjustments to facilitate merging.

[CoderPoet]

/LGTM

[bytedance-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CoderPoet, li-jin-gou, rfyiamcool, rogerogers

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