feat: Manually mark stories as seen

[DariCari]

It would be great if there is a button to mark stories manually as seen, if the "Disable story seen receipt" button is activated.
Also right now it seems like this button does not function correctly anymore.

[SoCuul]

This is intended to be added in the future. Annoyingly, as Instagram adores A/B testing it's incredibly difficult to inject a menu option (for example in the ••• menu) as it will only appear for some users. I would definitely like to include this in the future, however.