shell: add neovim plugins

nix-os/shell.nix

@@ -91,17 +91,38 @@ in
         set shiftwidth=4
         set expandtab
         set autoindent
+        set updatetime=500
 
         syntax on
         set encoding=utf-8
         set wildmode=longest,list,full
         set listchars=space:·,tab:┄┄»
         set indentkeys-=0#
+
+        " rainbow-delimeters-nvim
+        let g:rainbow_delimiters = {
+          \ 'strategy': {
+            \ ${"''"}: rainbow_delimiters#strategy.global,
+          \ },
+        \ }
+
+        " vim-gitguter
+        set signcolumn=yes
+        highlight SignColumn ctermbg=NONE
+        highlight GitGutterAdd ctermfg=2
+        highlight GitGutterChange ctermfg=4
+        highlight GitGutterDelete ctermfg=1
+
+        lua require('guess-indent').setup {}
       '';
       packages.myVimPackage = with pkgs.vimPlugins; {
         start = [
           guess-indent-nvim
           vim-visual-multi
+          autoclose-nvim
+          rainbow-delimiters-nvim
+          vimagit
+          vim-gitgutter
         ];
       };
     };