docs: add issue tracker and documentation links to pubspec

Author: ABausG

packages/home_widget/pubspec.yaml

@@ -14,6 +14,8 @@ screenshots:
     path: pub/screenshots/ios-counter.gif
   - description: 'Android HomeScreen Widget'
     path: pub/screenshots/android.png
+issue_tracker: https://github.com/ABausG/home_widget/issues
+documentation: https://docs.page/ABausG/home_widget
 
 environment:
   sdk: '>=3.4.0 <4.0.0'