Support media type "zstd" and show archive icon

[rakekniven]

Zstandard is a new compression method and many applications use it already.
See https://www.rfc-editor.org/rfc/rfc8878.html

Currently, nextcloud does not display the file extension zst as an archive type.

Example:

Each day I create some zip files and one zst file.
The activity app show it like this

What do I like to achieve:

• Nextcloud should handle zst with the correct MIME type
• Nextcloud should show archive icon for zst files.

I already tried to modify the mimetype handling on my NC v25.0.0 like described here:

• https://docs.nextcloud.com/server/latest/admin_manual/configuration_mimetypes/index.html
• https://portal.nextcloud.com/article/mimetypes-management-19.html

But no success.

Should I provide an PR of my work even if it is not working?

[rakekniven]

Hello @skjnldsv thank you again :-)