[Instagram] Expose Story mentions to keywords (-K/-j)

[Infinitay]

Would be nice to be able to filter posts to download them only if they mention a particular user. This is already returned as part of the reel in

gallery-dl/gallery_dl/extractor/instagram.py

Line 751 in 4c47dff

return reels.values()

If you make an extractor request to pull a story you can find the data the following example: list(reels.values())[<index>]['reel_mentions'][<index>]['user]'. From there you can access your typical user data such as username, full_name, and I suppose id with pk. When looking into this personally I was a bit confused to find it mentioned under reels seeing as reels and stories are two different things as far as I know.

Also, it would be nice if we can pull any text comments on the story, but I couldn't find any comment entry within the reels object from the line stated above.