Add hook to add button / modify messages

[tobiasdiez]

It is possible to add a button to the room header via

matrix-react-sdk-module-api/src/lifecycles/RoomViewLifecycle.ts

Line 42 in a4b4a93

export type ViewRoomListener = (opts: ViewRoomOpts, roomId: string) => void;

, but I couldn't find a similar hook to add a button to a message in the room, or otherwise change the appearance of the displayed messages.

Usecase: translate a given message into a different language