[l10n] Add ISO-like date and time display format for articles

[Korb]

Summary

In my country, the / isn't used to indicate dates. So, I'm still unclear whether 1/2 is the first of February or the second of January. I'm not suggesting adding all national standards, but I think it would be appropriate to include a Year-Month-Day¹ option in the Date format list, in addition to Day/Month and Month/Day, as an international standard.

Expected Behavior

YYYY-MM-DD hh:mm

Actual Behavior

DD/MM or MM/DD

Environment

• Microsoft Windows 10.0.26200.7705
• FeedFlow 1.9.0-desktop

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Related to #438

Footnotes

1. https://en.wikipedia.org/wiki/ISO_8601 ↩