We need to refactor the event listener in Mjolnir and the ManagedMjolnir

[Gnuxie]

Currently the managed mjolnir is emulating sync by emitting events on the mjolnir's matrix-bot-sdk MatrixClient. This is obviously hacky and will cause problems later on. We also don't have any way to emulate room.join for managed mjolnirs and this is an edge case that must be considered during this refactor.

mjolnir/src/appservice/MjolnirManager.ts

Lines 184 to 199 in 818e4cf

	public async onEvent(request: Request<WeakEvent>) {
	// phony sync.
	const mxEvent = request.getData();
	if (mxEvent['type'] !== undefined) {
	this.mjolnir.client.emit('room.event', mxEvent.room_id, mxEvent);
	if (mxEvent.type === 'm.room.message') {
	this.mjolnir.client.emit('room.message', mxEvent.room_id, mxEvent);
	}
	// TODO: We need to figure out how to inform the mjolnir of `room.join`.
	}
	if (mxEvent['type'] === 'm.room.member') {
	if (mxEvent['content']['membership'] === 'invite' && mxEvent.state_key === await this.mjolnir.client.getUserId()) {
	this.mjolnir.client.emit('room.invite', mxEvent.room_id, mxEvent);
	}
	}
	}