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/rbm/eip.go

@@ -0,0 +1,60 @@
+package rbm
+
+import (
+	"fmt"
+
+	"github.com/XingfenD/rainyun_api_go_sdk/apis/common"
+	"github.com/XingfenD/rainyun_api_go_sdk/constant"
+)
+
+// 创建并绑定弹性IP到RBM请求
+type RBMAssociateEIPRequest struct {
+	WithFlags  string `json:"with_flags"`   // IP特征(可选)
+	WithIPNum  int    `json:"with_ip_num"`  // 数量
+	WithIPType string `json:"with_ip_type"` // IPv4/IPv6
+}
+
+// 更换IP请求
+type RBMChangeIPRequest struct {
+	DisableOldIPReason string `json:"disable_old_ip_reason"` // 禁用旧IP的原因(可选)
+	IP                 string `json:"ip"`                    // 旧IP地址
+	ToIP               string `json:"to_ip"`                 // 不明，可选
+}
+
+// 设置IP描述请求
+type RBMSetIPDescriptionRequest struct {
+	Description string `json:"description"`
+	IP          string `json:"ip"`
+}
+
+// 放弃IP请求
+type RBMReleaseIPRequest struct {
+	IP string `json:"ip"`
+}
+
+// 创建并绑定弹性IP到RBM
+func (s *RbmService) AssociateEIP(id int, req *RBMAssociateEIPRequest) (*common.BasicOperationResponse, error) {
+	path := fmt.Sprintf("/product/rbm/%d/eip", id)
+
+	var resp common.BasicOperationResponse
+	err := s.client.Do(constant.HTTPMethod_POST, path, nil, req, &resp)
+	return &resp, err
+}
+
+// 设置IP描述
+func (s *RbmService) SetIPDescription(id int, req *RBMSetIPDescriptionRequest) (*common.BasicOperationResponse, error) {
+	path := fmt.Sprintf("/product/rbm/%d/eip/description", id)
+
+	var resp common.BasicOperationResponse
+	err := s.client.Do(constant.HTTPMethod_POST, path, nil, req, &resp)
+	return &resp, err
+}
+
+// 放弃IP
+func (s *RbmService) ReleaseIP(id int, req *RBMReleaseIPRequest) (*common.BasicOperationResponse, error) {
+	path := fmt.Sprintf("/product/rbm/%d/eip/discard", id)
+
+	var resp common.BasicOperationResponse
+	err := s.client.Do(constant.HTTPMethod_POST, path, nil, req, &resp)
+	return &resp, err
+}