Improve repo structure

users/froidmpa/neovim.nix

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+{ pkgs, ... }:
+{
+  enable = true;
+  vimAlias = true;
+  plugins = with pkgs; [
+    vimPlugins.gruvbox-community
+    vimPlugins.vim-airline
+    vimPlugins.vim-airline-themes
+    vimPlugins.vim-gitgutter
+    vimPlugins.nerdtree
+    vimPlugins.nerdtree-git-plugin
+    vimPlugins.ctrlp-vim
+    vimPlugins.tabular
+  ];
+  extraConfig = ''
+    let g:gruvbox_italic=1
+    colorscheme gruvbox
+    set background=dark
+    let g:airline_powerline_fonts = 1
+    autocmd VimEnter * hi Normal ctermbg=NONE guibg=NONE
+
+    "Toggle NERDTree with Ctrl-N
+    map <C-n> :NERDTreeToggle<CR>
+
+    "Show hidden files in NERDTree
+    let NERDTreeShowHidden=1
+
+    set number relativenumber
+
+    " Run xrdb whenever Xdefaults or Xresources are updated.
+    autocmd BufWritePost ~/.Xresources,~/.Xdefaults !xrdb %
+  '';
+}