New example conversation demoing various features

[nickvergessen]

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• Content to be provided by Marketing
• Samples:
  • Reference widget
  • Embedded image
  • Text/PDF
  • Only from sample files app

[Antreesy]

Should be similar to Changelog (Talk updates), but without locking of interaction?

[jancborchardt]

Another relevant thing here could be to show off the formatting as well, at least in one of the messages. (And other things like polls.)