Enable spoiler support for URLs and embedded images

[muddyfish]

When a image is embedded due to being linked to by URL such as

https://media.discordapp.net/attachments/561700849022140417/943800897358680064/SPOILER_Screenshot_20220217-092731.png

The spoiler filename should make the unfurled image spoiler tagged. Currently this is not the case, which makes it so commands which echo user provided attachments lose their spoiler property.
The same is the case for images used in embeds; they should similarly be spoiler tagged.

[Barmem]

yup, they still didnt solve it

[broman]

Thanks for the update

[advaith1]

You can set spoiler: true on media gallery items, file components, and container components. This lets bots spoiler these images in a more precise way.