Initial commit: dating app backend (Go/Gin/GORM/Postgres)

Phone+OTP auth, staged onboarding, admin approval workflow, and a
full discovery/swipe/match/chat system with photo upload and
approximate distance (haversine) based on user location.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/utils/response.go

@@ -0,0 +1,27 @@
+package utils
+
+import "github.com/gin-gonic/gin"
+
+// Response قالب استاندارد تمام پاسخ‌های API
+type Response struct {
+	Success bool        `json:"success"`
+	Message string      `json:"message,omitempty"`
+	Data    interface{} `json:"data,omitempty"`
+	Errors  interface{} `json:"errors,omitempty"`
+}
+
+func Success(c *gin.Context, code int, message string, data interface{}) {
+	c.JSON(code, Response{
+		Success: true,
+		Message: message,
+		Data:    data,
+	})
+}
+
+func Fail(c *gin.Context, code int, message string, errs interface{}) {
+	c.JSON(code, Response{
+		Success: false,
+		Message: message,
+		Errors:  errs,
+	})
+}