we are currently working on the hybrid support for Dynatrace. As you already noted in your email, the Cordova plugin works for Dynatrace and AppMon. Currently we are working on integrating hybrid apps into the UI as well, meaning that hybrid sessions should appear as one unified session with user actions from the native app and web. After this is available we will also make sure that there is documentation for Dynatrace available too.
Besides using the Cordova plugin you can also follow the manual instrumentation as described in the AppMon documentation.
Hybrid app sessions are now supported in the Dynatrace session search. To instrument a hybrid app you need to specify 2 apps (1 agentless web and 1 native mobile app) and then either use the Cordova plugin or manually download inline JS code via the REST API insert it into your html files and use Gradle to insert the Android agent and CocoaPods to insert the iOS agent.
Not yet - we are working on integrating the Cordova plugin in the deployment workflow and most certainly automate the step of defining the agentless web app, so that you do not have to worry about it manually.
As for the documentation, please refer to the doc on npmjs: https://www.npmjs.com/package/dynatrace-cordova-plugin