sh: Add vim personal knowledge base alias

Added alias `vw` to open the index page of my PKB (essentially the start
page of my wiki) using my zettelkasten.nvim plugin.

sh/.config/sh/alias

@@ -10,8 +10,9 @@ unalias -a
 # v shorthand for neovim
 if exist nvim; then
     alias v="nvim"
-    alias vs="nvim -c 'ScratchPad'"
     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