chore: make codes the repository root

internal/response/response.go

@@ -0,0 +1,21 @@
+package response
+
+import "github.com/gin-gonic/gin"
+
+type Envelope struct {
+	Code    string      `json:"code"`
+	Message string      `json:"message"`
+	Data    interface{} `json:"data,omitempty"`
+}
+
+func OK(c *gin.Context, data interface{}) {
+	c.JSON(200, Envelope{Code: "OK", Message: "success", Data: data})
+}
+
+func Created(c *gin.Context, data interface{}) {
+	c.JSON(201, Envelope{Code: "CREATED", Message: "created", Data: data})
+}
+
+func Error(c *gin.Context, status int, code, message string) {
+	c.AbortWithStatusJSON(status, Envelope{Code: code, Message: message})
+}