feat: symlinks evaluation in long mode

[canta2899]

Hi!

I implemented a way to evaluate symlinks in long mode, that behaves like the original ls. When the file is a symlink, logo-ls prints the symlink path followed by a -> symbol and the path of the original file.

Here's an example of the output:

I also had to correct a few case sensitive file names because I'm working on OS X (which has case insensitive paths) and I kept getting weird errors that did not allow me to stage changes.

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Note:
I opened another PR a few months ago (#35 which is still open and not merged). In order to avoid issues I developed this feature on another branch so that both the PRs can be evaluated independently and eventually merged with ease.

[svenlowrybjss]

Can this get approved and merged? Had to stop using logo-ls because I need to be able to see simlink destinations in ls commands!

[canta2899]

@svenlowrybjss If you want, I have a fork of logo-ls on my profile you can pull from until the PR has been (let's hope so) approved. So far I fixed a few issues and implemented this additional feature.