Show all types of content

[nicholaschiang]

Imported from @nicholaschiang's original Linear issue TS-79.

Instead of simply showing articles, users should be able to decide what types of content they want to see:

• Articles (i.e. external links shared on Twitter)
• Pictures
• Videos
• Tweets + Threads

[nicholaschiang]

Closing this because you can now switch between tweets and articles.