updated templates to display populated data and the ability to add/edit data in its corresponding html page

created html files inside templates/widget-calendar and added get_absolute_url for events class in models.py

Created a template named dashboard.html to display the website's dashboard page. Still needs to be modified to add the necessary links that will redirect the users to the other apps when clicked.

Created a template named widgetuser-add.html to display a form that allows users to add a new Widget User through the Add New Widget User page.