[ADF-2463] Moved core components to subfolder (#3062)

docs/core/notification.service.md

@@ -0,0 +1,58 @@
+---
+Added: v2.0.0
+Status: Active
+---
+# Notification Service
+
+Shows a notification message with optional feedback.
+
+![Notification Service screenshot](docassets/images/NotiService.png)
+
+## Methods
+
+-   `openSnackMessage(message: string, millisecondsDuration?: number): MatSnackBarRef<any>`  
+    Opens a snackbar notification to show a message.  
+    -   `message` - The message to show
+    -   `millisecondsDuration` - (Optional) Time before notification disappears after being shown
+-   `openSnackMessageAction(message: string, action: string, millisecondsDuration?: number): MatSnackBarRef<any>`  
+    Opens a snackbar notification with a message and a response button.  
+    -   `message` - The message to show
+    -   `action` - Caption for the response button
+    -   `millisecondsDuration` - (Optional) Time before the notification disappears (unless the button is clicked)
+
+## Details
+
+The Notification Service is implemented on top of the Angular Material Design snackbar.
+Use this service to show a notification message, and optionally get feedback from it.
+
+```ts
+import { NotificationService } from '@alfresco/adf-core';
+
+export class MyComponent implements OnInit {
+
+    constructor(private notificationService: NotificationService) {
+    }
+
+    ngOnInit() {
+          this.notificationService.openSnackMessage('test', 200000).afterDismissed().subscribe(() => {
+                    console.log('The snack-bar was dismissed');
+                });
+    }
+}
+```
+
+```ts
+import { NotificationService } from '@alfresco/adf-core';
+
+export class MyComponent implements OnInit {
+
+    constructor(private notificationService: NotificationService) {
+    }
+
+    ngOnInit() {
+         this.notificationService.openSnackMessageAction('Do you want to report this issue?', 'send', 200000).afterDismissed().subscribe(() => {
+                console.log('The snack-bar was dismissed');
+            });
+    }
+}
+```