✨ add (nerfed) neovim config from wsl branch

nixos/neovim.nix

@@ -0,0 +1,61 @@
+{ config, pkgs, ... }:
+
+{
+  programs.neovim = {
+    enable = true;
+    defaultEditor = true;
+    # package = pkgs.neovim;
+    configure = {
+      customRC = ''
+        set title
+        set go=a
+        set mouse=a
+        set nohlsearch
+
+        set bg=dark
+        " set bg=light
+
+        colorscheme gruvbox
+
+        " relative line numbering when leaving insert mode
+        set relativenumber
+        autocmd InsertEnter * :set number norelativenumber
+        autocmd InsertLeave * :set nonumber relativenumber
+
+        " netrw (dir listing) settings
+        let g:netrw_liststyle = 3
+        let g:netrw_banner = 0
+        let g:netrw_browse_split = 3
+        let g:netrw_winsize = 25  " % of page
+
+        set listchars=tab:→\ ,space:·,nbsp:␣,trail:•,eol:¶,precedes:«,extends:»
+        set clipboard+=unnamedplus
+
+        " Replace-all is aliased to S.
+        nnoremap S :%s//g<Left><Left>
+
+        " spellcheck
+        set spell spelllang=en_us
+        setlocal spell! spelllang=en_us
+      '';
+      # vimPlugins inspired from Alexnortung
+      # https://discourse.nixos.org/t/neovim-no-longer-uses-config-or-plugins/13399/4
+      packages.nix = with pkgs.vimPlugins; {
+        start = [
+          vim-surround  # shortcuts for setting () {} etc.
+          # coc-nvim coc-git coc-highlight coc-python coc-rls coc-vetur coc-vimtex coc-yaml coc-html coc-json # auto completion
+          vim-nix       # nix highlight
+          vimtex        # latex stuff
+          fzf-vim       # fuzzy finder through vim
+          nerdtree      # file structure inside nvim
+          rainbow       # color parenthesis
+          gruvbox-nvim  # theme
+          goyo-vim      # write prose
+          limelight-vim # prose paragraph highlighter
+        ];
+        opt = [];
+      };
+    };
+  };
+}
+