Bot Protocol

[PenguinBoi12]

This PR add a BotLike protocol to properly add access to methods like get_room to extensions. This should allow extension to do things like:

@extension.event
async def on_member_join(matrix_room: MatrixRoom, event: RoomMemberEvent) -> None:
    if not _is_new_join(event):
        return

    member_name = _member_display_name(room, event.state_key)
    room = extension.get_room(matrix_room:.room_id)

    if room:
        await .send(f"Welcome {member_name}! Glad to have you here.")

[jerlendds]

LGTM couldve deleted the types to pass CI a la vibe coders - glad you didnt :P