Notifications and Tasks integration

[jasonpagetas]

Similar to integrating a calendar into Centurion but this time with tasks.

Requested features:

• Notifications added as tasks

• User can set how long the default time the task is active e.g When a new task notification is created it expires in 7 days

• Add labels to tasks e.g Project name, type(notification), type(feedback required)

• Integrate these tasks into calendars and home assistant

• if a tasks is marked as complete on another service if needs to disappear on Centurion and visa versa

• If a task is opened in in Centurion it should be marked as done automagically

• Relate: Calendar integration #253