[Feature] DevIcons/NerdFonts Support

[Sidd-Dino]

I saw the issue #122 and i thought i might try to give a go. There might be bugs so feel free to point them out :D

[Sidd-Dino]

The icons can be toggled on and off with the variable FFF_FILE_ICON Set it to 1 to display icons.

[Sidd-Dino]

It requires further simplification and cleanup but this is nothing but a basic implementation I'll clean it up later

[Sidd-Dino]

I cleaned up the repetitions. I've checked as far as i can. It seems to work.

[qwool]

i know it's a bit too late, but what's the font it needs to function? i patched it in and it displays as random unicode characters edit: nvm, i found it. you have to set any of https://github.com/ryanoasis/nerd-fonts as your terminal font

[guilhermeprokisch]

Thanks for that! Even it's not merged yet :)