Link previews

[cyberlis]

Describe your feature:

Link previews (link cards) like in telegram and other messengers
Example

Why do you think it is useful:

It helps to search for relevant content

[adbenitez]

some notes:

• it should be possible to disable this feature for privacy reasons
• the fetching of the preview should respect the proxy settings in the app

[Arcterus]

I think this should have three settings:

1. Always attempt to generate a link preview.
2. Ask if you want to generate a link preview per link/message with a link (maybe just a generate preview button rather than a popup or something).
3. Never generate link previews.

The default should be either 2 or 3 (2 IMO).