feat: add medias controller, service and dto

backend/app/http/medias/dto.go

@@ -0,0 +1,18 @@
+package medias
+
+type UploadReq struct {
+	Files []string `json:"files"`
+}
+
+type UploadResp struct {
+	Files []UploadFile `json:"files"`
+}
+
+type UploadFile struct {
+	HashID   string `json:"hash_id"`
+	Name     string `json:"name"`
+	Size     int64  `json:"size"`
+	MimeType string `json:"type"`
+	Path     string `json:"path"`
+	Preview  string `json:"preview"`
+}