matrix: Print room version when available

Guido Güntherrequested to merge
guidog/Chatty:room_version into main

Only works for new rooms where we persisted the room event.

Needs a libcmatrix update: https://source.puri.sm/Librem5/libcmatrix/-/merge_requests/113

Signed-off-by: Guido Günther agx@sigxcpu.org

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