nvim: Enter notes dir when calling zettel index

When switching the current buffer to the Zettelkasten index page
(`<leader>ni`), we now also switch the working directory to the
corresponding notes directory.

sh/.config/sh/alias

@@ -7,20 +7,14 @@ exist() { type "$1" >/dev/null 2>&1; }
 # Avoid aliases which I did not create -- unalias EVERYTHING
 unalias -a
 
-# v shorthand for neovim
-if exist nvim; then
-    alias v="nvim"
-    alias vim="nvim"
-    alias vs="nvim -c 'ScratchPad'"                                # open an empty 'scratchpad' which simply disappears after use
-    alias vw="nvim -c \"lua require 'zettelkasten'.index_open()\"" # open to personal wiki
-elif exist vim; then
-    alias v="vim"
-else
-    alias v="vi"
-    alias vim="vi"
+if alias v >/dev/null 2>&1; then
+	if exist vim; then
+		alias v="vim"
+	else
+		alias v="vi"
+		alias vim="vi"
+	fi
 fi
-# open notes with my vim zettelkasten plugin
-alias vn='v +"lua require \"zettelkasten\".index_open()"'
 
 # exit shell mimicks vim
 alias :q="exit"