Implement MSC3952: Intentional mentions #2606
Description
MSC3952 defines push rules which act on a list of MXIDs in the event body, instead of searching the entire event body for display name / local part.
There might be some more MSCs to implement to get it right. The related EW issue lists 3 others MSCs as dependencies.
As a SDK user, I need to:
- be notified when my app user is mentioned
- Allow clients to send intentional mentions #2722