Add a flag to ignore `EACCES`

[tavianator]

From https://twitter.com/tavianator/status/1798748962163204510

One thing that's sometimes nice about fd is suppressing "permission denied" errors by default. Usually my bfs commands in my home directory spew lots of these errors due to podman images which aren't owned by me.

Not sure what to call the flag, -ignore_inaccessible or something?