feat: add regional pricing api

packages/core/api/pricing.js

@@ -0,0 +1,34 @@
+import http from "notes-core/utils/http";
+
+const BASE_URL = `https://notesnook.com/api/v1/prices`;
+class Pricing {
+  /**
+   *
+   * @param {"android"|"ios"|"web"} platform
+   * @param {"monthly"|"yearly"} period
+   * @returns {Promise<{
+   *    country: string,
+   *    countryCode: string,
+   *    sku: string,
+   *    discount: number
+   * }>}
+   */
+  sku(platform, period) {
+    return http.get(`${BASE_URL}/skus/${platform}/${period}`);
+  }
+
+  /**
+   *
+   * @param {"monthly"|"yearly"} period
+   * @returns {Promise<{
+   *    country: string,
+   *    countryCode: string,
+   *    price: string,
+   *    discount: number
+   * }>}
+   */
+  price(period) {
+    return http.get(`${BASE_URL}/${period}`);
+  }
+}
+export default Pricing;