plugins: add devicons plugin to display icons

* Adds the devicons plugin that can display icons with the help of nerd
  patched fonts in some other plugins.
* Update the README accordingly, in the requirements section.

Co-Authored-by: iGor milhit <igor@milhit.ch>

README.md

@@ -32,6 +32,7 @@ I'm using the [nord color scheme][5].
 1. All or any of these python linters: `pep8`, `flake8`, `pycodestyle`,
    `pyflakes`.
 1. `scss_lint` (ruby), for SCSS lint.
+1. A [font patched for nerds][8].
 
 ## Installation
 
@@ -68,3 +69,4 @@ See the `fzf` documentation: <https://github.com/junegunn/fzf#preview-window>
 [4]: /requirements
 [5]: https://www.nordtheme.com/ports/vim
 [7]: https://github.com/junegunn/vim-plug#installation
+[8]: https://www.gitmemory.com/ryanoasis/nerd-fonts

init.vim

@@ -35,6 +35,7 @@ Plug 'jremmen/vim-ripgrep'                                                  " Us
 Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }                         " Fuzzy search, ensure fzf is fresh installed
 Plug 'junegunn/fzf.vim'                                                     " fzf for vim/neovim
 Plug 'stsewd/fzf-checkout.vim'                                              " Fuzzy search in git branches
+Plug 'ryanoasis/vim-devicons'                                               " Add icons to plugins
 call plug#end()
 
 " Format indentation