Add LocalStorage Capabilities

The database is made persistent with the help of localStorage and its API's.

Author: Jai2501

package-lock.json

@@ -0,0 +1,15 @@
+import QuestionDatabase from "../DataModel/QuestionDatabase";
+
+function updateQuestionDatabase(updatedDatabase) {
+    localStorage.setItem("questions", updatedDatabase)
+}
+
+function retrieveQuestionDatabase() {
+    return localStorage.getItem("questions");
+}
+
+function setupQuestionDatabase() {
+    localStorage.setItem("questions", QuestionDatabase());
+}
+
+export { setupQuestionDatabase, retrieveQuestionDatabase, updateQuestionDatabase };