I mean there are better tools, such as TMSU or tagfs, which i think are actually better approaches to having (part of) your file system displayed in a non-hierarchical way - or rather in a dynamic hierarchy.
But the other poster is also right in that for your system file system, i.e. root and operating-system critical paths, do not benefit from such an approach. I think asking for such a thing kind of sounds like an XY problem and requires listing the actual problems to solve with an alternative approach first.
For issues tracking there’s the venerable git-bug, although development has sadly slowed way down in the last years.
And I am always jealous of the way fossil repositories just have a complete front-end and wiki baked in, would love something like that for git.