feat: add SmartOpenDirectory hlgroup to enable user customization

[smjonas]

Closes #65.

[danielfalk]

I was just testing this out, and it appears to remove the "Directory" highlighting. I take it your colorscheme has a color defined for SmartOpenDirectory, so it looks fine for you?

Here's how it usually looks:

and here's how it looks with this PR applied:

[smjonas]

This is how it looks for me with the tokyonight colorscheme (which does not define a SmartOpenDirectory highlight):

Changing the Directory hlgroup to red (:highlight Directory guifg=red) yields this, as before (which is expected):

So I am unsure what causes the issues for you. Which colorscheme are you using?

[danielfalk]

I figured it out. I happen to have a script that set a colorscheme, and it runs after this plugin is initialized. I believe the solution is to create an autocmd. Let me see if I can do that.

[danielfalk]

This is now available in 0.3.x . Thanks!