[meta] EBT - Collect general info on the browser side

[afharo]

The feedback on the generic click event has been great so far as other Kibana devs can easily find out if a feature/button is used just by filtering the click events via their CSS selector. It feels like free telemetry to them.

To follow this trend, the @elastic/kibana-core team (and potentially the @elastic/shared-ux) could work together to collect more generic info that benefits us all. Some ideas are (feel free to extend the list):

• [EBT] Include viewport width to the context of the browser events #140926
• [EBT] Add navigation events #140928
• [EBT] Include tab information to the context #140930
• [EBT] Generate events for every toast generation #140931
• [EBT] Report Uncaught Exceptions #140932
• [EBT] Collect console errors #140933
• [EBT] Add visibility changes in the tab #140934
• [EBT] Track impressions #144031

[afharo]

cc @elastic/kibana-operations as some of these events might be relevant to the Performance WG.