feat!: remove special case for _ prefixed files in windows

[jschpp]

On windows files prefixed with a _ were being ignored because some old applications used those files as pseudo dotfiles.

This was controversial when the feature was added way back when: ogham/exa#820 (review)

Fixes #1220

[cafkafk]

This will need some discussion before being implemented

[jschpp]

Yeah. I completely agree with you there.
I'm not sure if removing is the right way to go forward here myself.
I tried hiding this behind a cmd flag but couldn't quite get it to work since I'd need to add something like git_ignoring which will have to be included pretty much everywhere since it would touch the Files API

[fgimian]

I personally vote that this behaviour be removed completely as per this PR. The current behaviour is very unexpected and unusual, so much so that it feels like a bug. 😊

[jack-mil]

Any more thoughts from maintainers about getting this merged? Would love to see this annoyance dealt with.

[cafkafk]

I think the easiest way to move forward with this would be to allow the old behavior via a flag, I do think we could probably just get rid of this as a default, but it was probably added because someone found it valuable.