I don’t think Obsidian should refer to .gitignore. A separate file .obsidianignore folder would be great, so that such code, binaries, and external that isn’t part of the functionality of the Obsidian tooling can be excluded thus not resulting in broken indexes and slow-downs in starting time in Obsidian.
Please please pleeeeease include .obsidianignore feature please, where when a path is defined (relative or absolute, wildcards included - just like in .gitignore) those defined files will not be included in indexing at all for Obsidian. Also it would not show in Obsidian such files (I think this is already good, because no binaries or applications are shown, but I just wanted to mention the scope - both indexing and visibility of the excluded files).