Add support for join rule handling

[maltee1]

[maltee1]

somehow, portal.handleMatrixJoinRules doesn't seem to be called upon receiving a join rule event

[tulir]

Probably missing the event handler in the matrix connector

[maltee1]

I implemented that, but it doesn't even get there. Seems portal.handleMatrixEvent isn't even called. I'm confused.

There should be some kind of debug output mentioning the event type, even if there is no handler, right? This is all I get:

{"level":"debug","transaction_id":"1359356","content":{"pdu":1,"unstable_edu":0,"unstable_to_device":0},"time":"2024-08-20T21:52:42.00156651+02:00","message":"Starting handling of transaction"}
{"level":"debug","transaction_id":"1359356","time":"2024-08-20T21:52:42.001723684+02:00","message":"Finished dispatching events from transaction"}

[tulir]

Portal is in the central bridge module, it only gets events that the matrix connector registers handlers for

[maltee1]

then why is portal.handleMatrixPowerLevels called even though this branch doesn't have a handler for power levels?

[tulir]

https://github.com/mautrix/go/commit/b899ef773f8f9ca4ff216d89abe0cae278bbc64a

[maltee1]

oh...