added: template responses package

pkg/responses/errorResp.go

@@ -0,0 +1,21 @@
+package responses
+
+type ErrorResponse400 struct {
+	Error string `json:"error" example:"Bad Request"`
+}
+
+type ErrorResponse401 struct {
+	Error string `json:"error" example:"Unauthorized"`
+}
+
+type ErrorResponse403 struct {
+	Error string `json:"error" example:"Forbidden"`
+}
+
+type ErrorResponse500 struct {
+	Error string `json:"error" example:"Internal Server Error"`
+}
+
+type ErrorResponse501 struct {
+	Error string `json:"error" example:"Unimplemented"`
+}