Support hyperlink rendering

[pothos]

The --hyperlink option for ls¹ is allows to open a document/folder with the default (GUI) application by using Ctrl+click in various terminals.
It would be nice to have this in lsd.
See here for more info: https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda

¹ http://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=799bac0d06cfabe9491498727308df8d1aca6d98

exa issue: ogham/exa#396

[Peltoche]

Hi @pothos

Thanks for the proposition. Personally I don't see the when this feature could be used (a filename with a link ??) but if someone needs it let's go for it. At the moment I don't have the time to write new features but I would review a PR with pleasure it you want to make one.

[xenopeek]

Running ls --hyperlink in any VTE based terminal (like Gnome Terminal) lets you ctrl+click any file in the ls output to open it with its default filetype handler (or open the link through context menu). i.e., ctrl+click a text file opens the file in your text editor, ctrl+click a directory opens the directory in your file manager and so on. Quite handy, try it out.

[KSXGitHub]

I have made a pull request for initial support. But I am way too tired to fix any remaining issue. _{Seriously, reading this codebase is like traversing a labyrinth}

[ppwwyyxx]

The implementation of hyperlink support in #642 does not match the recommendation in the OSC8 spec here https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda#file-uris-and-the-hostname that suggests hostname to be included in the hyperlink. This is what ls --hyperlink does as well.