Add a task adding widget

[PMunch]

I would really like a widget to add tasks with. Essentially just the add task bar currently in the app, as a widget. This would allow you to add tasks directly from any screen supporting widgets. And combined with something like WidgetDrawer (now part of Lockscreen widgets) you could add tasks from anywhere!

[bradyt]

This is low priority. I may occasionally review what sort of work this may involve.

Factors that lower priority include:

• Not setup for contributions to codebase
• My knowledge of Android Java and Android Kotlin is negligible (most of app code is in Dart and Flutter)
• My primary usage of app is not currently on Android
• Other priorities for platform-specific features, like improving layout for landscape, larger screens, or desktop
• High cost low reward for implementing a feature specific to one platform
• Hard to write tests for
• The future of Taskserver is unknown, which motivates being conservative about where to spend energy here, for example that is why recently I shifted to putting effort into adding testing, as it might help with either of:
  1. Reworking sync functionality to work with new Taskwarrior sync mechanism
  2. Or writing tests is a skill that may translate to just working on an entirely new app

As well, there is a similar app, that I believe is exploring an Android widget feature:

• https://github.com/bgregos/foreground/issues?q=widget+sort:created-asc

In general, I think Foreground is definitely superior in terms of implementing some platform-specific features, for example, I think the name alludes to Android notifications. Notifications are another example of a low priority feature for the same reasons.

If anyone is curious what this might entail, here are some search results I think are relevant:

• https://github.com/ABausG/home_widget
• https://medium.com/@ashishgarg1998/how-to-create-home-screen-app-widgets-in-flutter-ce3458f3638e
• https://stackoverflow.com/questions/44120149/android-lock-screen-widget-in-flutter
• https://stackoverflow.com/questions/47504574/is-it-possible-to-build-android-widgets-in-flutter