feat: migrate all remaining modules from rainyun-go-sdk

- domain(24), product(8), rbm(10), rca(21), rgs(38), ros(19),
  ssl(5), user(10), workorder(11), public remaining 5
- split nested response structs into reusable named types
- rgs reuses rcs request/response types
- fix source bugs: malformed paths, resp vs &resp, missing bodies
- register all 11 services in sdk.New

apis/public/get_ros_plans.go

@@ -0,0 +1,38 @@
+package public
+
+import "github.com/XingfenD/rainyun_api_go_sdk/constant"
+
+// https://api.rainyun.com/#/paths/product~1ros~1plans/get
+
+// 获取对象存储套餐列表
+type GetRosPlanListResponse struct {
+	Code int           `json:"code"`
+	Data []RosPlanItem `json:"data"`
+}
+
+type RosPlanItem struct {
+	ID                 int     `json:"id"`
+	Region             string  `json:"region"`
+	Subtype            string  `json:"subtype"`
+	PlanName           string  `json:"plan_name"`
+	Machine            string  `json:"machine"`
+	ChargeType         string  `json:"charge_type"`
+	Chinese            string  `json:"chinese"`
+	IsFree             bool    `json:"is_free"`
+	PointRenewPrice    any     `json:"point_renew_price"` // 积分续费价格
+	IsSelling          bool    `json:"is_selling"`
+	Price              int     `json:"price"`
+	StorageSize        int     `json:"storage_size"`
+	Bandwidth          int     `json:"bandwidth"`
+	ExtraTransferPrice float64 `json:"extra_transfer_price"`
+	ExtraStoragePrice  float64 `json:"extra_storage_price"`
+}
+
+func (s *PublicService) GetRosPlanList() (*GetRosPlanListResponse, error) {
+	path := "/product/ros/plans"
+
+	var resp GetRosPlanListResponse
+	err := s.client.Do(constant.HTTPMethod_GET, path, nil, nil, &resp)
+
+	return &resp, err
+}