[Feature Request] Allow to add buckets using Tasker

Writing custom watchers is relatively complicated on Android. However, there is a big automation community on Android which uses tools like [Tasker](https://play.google.com/store/apps/details?id=net.dinglisch.android.taskerm&hl=en&gl=US), or even better: [Automate](https://play.google.com/store/apps/details?id=com.llamalab.automate&hl=en&gl=US). If the ActivityWatch Android app would have a Tasker Plugin you could program custom watchers very easily, because apps like automate already allow you to request a REST API every n-second, or to capture user events. Then, using the Tasker plugin interface they could pass this data to activity watch.

Further information about Tasker plugins can be found [here](https://tasker.joaoapps.com/plugins-intro.html), a detailed implementation guide [here](https://tasker.joaoapps.com/pluginslibrary.html).