Added packages for students to be able to purchase

src/interfaces/paypal.ts

@@ -0,0 +1,23 @@
+export interface TokenSuccess {
+	scope: string;
+	access_token: string;
+	token_type: string;
+	app_id: string;
+	expires_in: number;
+	nonce: string;
+}
+
+export interface TokenError {
+	error: string;
+	error_description: string;
+}
+
+export interface Package {
+	id: string;
+	currency: string;
+	duration: number;
+	duration_unit: DurationUnit;
+	price: number;
+}
+
+export type DurationUnit = "weeks" | "days" | "months" | "years";