a timer linked to a habit tracker

[AtifJamel]

I'd like to see this feature added to the app, which is to add a haibts tracker for specific tasks with a timer attached to it, so that if I usually read for 15 minutes, the app will know that if I click on the haibts tracker of reading, after 15 minutes it will notify me that the time is finished and register it automatically. This will be a really useful feature.

[c-mena]

Related to #2296