Meta issue: All event types

[hikingc]

Currently only m.room.message event is handled, but there is at least 10 diff events that go by the same endpoint so a big refactor is needed to allow them all by the same door. It is as follows

State events (has state_key)

• - m.room.create
• - m.room.member
• - m.room.power_levels
• - m.room.join_rules
• - m.room.history_visibility
• - m.room.guest_access
• - m.room.name
• - m.room.topic
• - m.room.avatar
• - m.room.canonical_alias
• - m.room.pinned_events
• - m.room.encryption
• - m.room.server_acl
• - m.room.tombstone
• - m.room.third_party_invite
• - m.space.child
• - m.space.parent

Timeline / transactional events (no state_key, sent via txnId)

• - m.room.message
• - m.sticker
• - m.reaction
• - m.room.redaction
• - m.room.encrypted
• - m.call.invite
• - m.call.candidates
• - m.call.answer
• - m.call.select_answer
• - m.call.negotiate
• - m.call.reject
• - m.call.hangup
• - m.key.verification.request
• - m.key.verification.start
• - m.key.verification.accept
• - m.key.verification.key
• - m.key.verification.mac
• - m.key.verification.done
• - m.key.verification.cancel

Not room-DAG events (different transport — /sync ephemeral or account_data)

• - m.typing
• - m.receipt
• - m.presence
• - m.tag
• - m.direct
• - m.fully_read

[hikingc]

Method overloads might be required if some events can't be satisfied with polymorphism (diff required keys)

[hikingc]

I have sucessfully migrated to the new interface system, at the expense of killing m.room.message, but with time I will iron things out

c284cbb