Link files with known playable extensions to Parchment

[dfabulich]

https://unbox.ifarchive.org/?url=/if-archive/games/competition2024/Games/198BREW.zip

This file contains an Inform-generated website, and a .gblorb file. It would be cool if there were a link next to the .gblorb file to "Play in Parchment." The link would link to https://iplayif.com/?story=https%3A%2F%2Funbox.ifarchive.org%2F0z4rwzqfue%2F198BREW%3A%2520The%2520Age%2520of%2520Orpheus.gblorb

[dfabulich]

This would be even more useful for zips that contain no HTML but do contain Parchment-playable story files, like https://unbox.ifarchive.org/?url=https%3A%2F%2Fifarchive.org%2Fif-archive%2Fgames%2Fcompetition2024%2FGames%2FHebe.zip

In that case, it would be nice to add a prominent "Play in Parchment" button at the top of the page, like the "Open index.html" button that appears when HTML is detected.