feat: make obsidian-vim and neovim bearable

packages/obsidian-vim.nix

@@ -1,17 +1,29 @@
 {
   neovim,
   vimPlugins,
-  vault ? "~/cloud/syncthing/obsidian/",
+  obsidiantVaultDirectory ? "~/cloud/syncthing/obsidian/",
   ...
 }:
 neovim.override {
   configure = {
     customRC = ''
-      let g:vimwiki_list = [{'path': '${vault}',
+      source ${../lib/vim/shared.vim}
+
+      cd ${obsidiantVaultDirectory}
+
+      let g:vimwiki_list = [{'path': '${obsidiantVaultDirectory}',
         \ 'syntax': 'markdown', 'ext': '.md'}]
+
+      let NERDTreeSortOrder = ['[[-timestamp]]']
+
+      " Start NERDTree and put the cursor back in the other window.
+      autocmd VimEnter * NERDTree ${obsidiantVaultDirectory} | wincmd p
     '';
     packages.nvim.start = [
       vimPlugins.vimwiki
+      vimPlugins.nerdtree
+      vimPlugins.fzf-vim
+      vimPlugins.fzfWrapper
     ];
   };
 }