Add Flatpak (.var) info

[HanabishiRecca]

No description provided.

[b3nj5m1n]

Hi, is .var actually only used by flatpak? I.e. is the directory structure ~/.var/files or more like ~/.var/flatpak/files?

I haven't been able to find much about this online, but this answer concerns me a little.

[HanabishiRecca]

Can't say, I personally don't know other apps using it.
As for Flatpak structure, you can read particular info here https://github.com/flatpak/flatpak/wiki/Filesystem

[b3nj5m1n]

Thanks for the link, should be safe to merge.