feat: Initialize gormplus db

Author: afumu

gormplus/gormplus.go

@@ -0,0 +1,10 @@
+package gormplus
+
+import (
+	"github.com/zouchangfu/gorm-plus/mapper"
+	"gorm.io/gorm"
+)
+
+func Init(db *gorm.DB) {
+	mapper.GormDb = db
+}