add QR scanner for adding a contact

src/constants/app.ts

@@ -1,8 +1,10 @@
 /**
  * Generic strings that could be used throughout the app.
+ *
+ * See also ../libs/veramo/setup.ts
  */
 export enum AppString {
-  APP_NAME = "Kick-Start with Time",
+  APP_NAME = "Time Safari",
 
   PROD_ENDORSER_API_SERVER = "https://api.endorser.ch",
   TEST_ENDORSER_API_SERVER = "https://test-api.endorser.ch",
@@ -10,3 +12,13 @@ export enum AppString {
 
   DEFAULT_ENDORSER_API_SERVER = TEST_ENDORSER_API_SERVER,
 }
+
+/**
+ * See notiwind package
+ */
+export interface NotificationIface {
+  group: string;
+  type: string; // "toast" | "info" | "success" | "warning" | "danger"
+  title: string;
+  text: string;
+}