modify NewLogger, add example

logger.go

@@ -46,7 +46,7 @@ type Logger struct {
 	initialized bool
 }
 
-func NewLogger(mod ...ModOptions) *zap.Logger {
+func NewLogger(mod ...ModOptions) *Logger {
 	logger = &Logger{}
 	logger.Lock()
 	defer logger.Unlock()
@@ -90,7 +90,7 @@ func NewLogger(mod ...ModOptions) *zap.Logger {
 	logger.zapConfig.Level.SetLevel(logger.Opts.Level)
 	logger.init()
 	logger.initialized = true
-	return logger.Logger
+	return logger
 }
 
 func (logger *Logger) init() {