[remark-wiki-link] Temporarily parse Obsidian note embeds as regular wiki-links

[olayway]

Many users are likely to have markdown files with Obsidian-style transclusions, and the current lack of support or even a temporary workaround is causing issues. By implementing this temporary solution, we can ensure that the user experience remains smooth while we plan and develop full support for this feature.

Original issue: datopian/flowershow#545

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Acceptance

• Obsidian note embeds are transformed into regular a tags, just like regular wiki links
• relevant documentation updated to reflect this temporary change