Permalinks to a room/space should be pills

[giomfo]

Part of element-hq/element-meta#1030

When a room's link (matrix.to or custom base url) is sent to the timeline, it should not show as the URL but instead the pill.

The pill should show the room/spaces avatar and name, like this:
If this is not possible, because the user does not have access to the room name or avatar, the pill should show the default room icon and "Room/Space". Like this:

Note: About this last case, if the room's link provides an alias, we should display it by default (instead of "room"), the avatar will display then a #)

Note2: the avatar and the room name may be retrieved by using the Room summary API

Will you send logs?

No

Are you willing to provide a PR?

Yes

[giomfo]

Done in next release (> v1.5.28)