feat: add refferal feature

types/referral.ts

@@ -0,0 +1,20 @@
+export interface ReferralRewardUser {
+    id: number;
+    uuid: string;
+    name: string;
+    email: string | null;
+    mobile: string | null;
+    referral_code: string | null;
+    successful_invites: number;
+}
+
+export interface PendingReferralRewardsResponse {
+    subscription_target: number;
+    data: ReferralRewardUser[];
+}
+
+export interface FulfillReferralRewardResponse {
+    message: string;
+    user_id?: number;
+    product_id?: number;
+}