Allow ignore/unignore rules in .ignore

[Canop]

Files called .ignore with the syntax of gitignore files are now read and used just like .gitignore files.

When, at the same level, broot finds rules from both a .ignore and a .gitignore files, the .ignore is the decisive one (it's assumed to be personal and meant to override the shared .gitignore file.

Eg I can have a global .gitignore file with

dys-notes.*

which helps me have notes everywhere and not sharing them.

And I can have a .ignore file, which reveals some of those files in broot:

!dys-notes.md 

Fix #613

[FrancescElies]

tests

1. ✅ broot_*zip.
   Image: upper-left (fd), bottom-left: broot, upper-right: .ignore, bottom-right: .gitignore

2. ✅ Here I was expecting the zip file releases/broot_/broot_.zip to appear in broot but then I realized fd was behaving the same way, I had wrong expectations.
   Image: upper-left (fd), bottom-left: broot, upper-right: .ignore, bottom-right: .gitignore

3. ✅I did the same test as you described above.
   Image: upper-left (fd), bottom-left: broot, upper-right: .ignore, bottom-right: .gitignore

[Canop]

Thanks for the tests and detailed report!

Regarding the 2: it's because when you ignore releases, you don't even have a look at what's inside.

[Canop]

In the current implementation, when you're inside a git repository, .ignore files outside this repository aren't taken into account.

This mimics the behavior which was defined for git, but there are use cases which are thus not supported.

[FrancescElies]

For the time being it’s ok, you can add those afterwards when there is enough people begging for those missing features.

By the way it was so nice to see that being added to broot with such a small patch 🤩

[Canop]

I'm currently adding those feature, after reflexion.

I want to support the case of having dys-notes.* always gitnored and always unignored, with only global files.

[Canop]

@FrancescElies I made #932

(I'll test it more but your opinion would of course be welcome)

[Canop]

Merged. Documentation has been improved: https://dystroy.org/broot/tree_view/#hidden-ignored-files