[Feature] Add link to UIGF/SRGF standard

[Emojigit]

Checklist

• [X] I have already read docs/Tips.md, but my feature is not implemented.
• [X] My suggested feature was not mentioned by others, and it is not a duplicate feature.

Summary

According to the UIGF/SRGF standard, "Application must declare support of UIGF/SRGF data format only after [...] provide link [sic] to UIGF-Org in the associated page."[^1] However, such links are not present on Starward.

[^1]: Found on their official website. For UIGF, see https://uigf.org/en/standards/uigf.html. For SRGF, see https://uigf.org/en/standards/srgf.html.

Solution or Design

A "question mark" more information button can be added next to the export/import function. Upon clicking it, it shows a message saying "Supports importing JSON files in the UIGF data format," where UIGF/SRGF points to the specification page or the UIGF-Org main page.

After adding this link, we can also officially declare support for UIGF/SRGF data.

Examples:

[Scighost]

Thanks for your suggestion, I will implement latter.