[sc-12339] fix importing cookie library, expose cookie related methods

Author: haoAddsearch

src/cookie.ts

@@ -1,4 +1,4 @@
-import cookie from 'cookie';
+import * as cookie from 'cookie';
 
 const setCookie = (cookieName: string, cookieValue: string, expireDays: number): void => {
   if (typeof document === 'undefined') {

src/index.ts

@@ -520,6 +520,14 @@ class AddSearchClient {
     }
   }
 
+  setCookie(cookieName: string, cookieValue: string, expireDays: number): void {
+    cookie.setCookie(cookieName, cookieValue, expireDays);
+  }
+
+  getCookie(cookieName: string): string | undefined {
+    return cookie.getCookie(cookieName);
+  }
+
   searchResultClicked(documentId: string, position: number): void {
     this.sendStatsEvent('click', this.settings.getSettings().keyword || '', {
       documentId,