[zsh] initialize direnv as recommended by p10k

.zshrc

@@ -1,4 +1,5 @@
 stty -ixon # Disable ctrl-s and ctrl-q.
+(( ${+commands[direnv]} )) && emulate zsh -c "$(direnv export zsh)"
 
 # Enable Powerlevel10k instant prompt. Should stay close to the top of ~/.zshrc.
 # Initialization code that may require console input (password prompts, [y/n]
@@ -26,7 +27,7 @@ if command -v fzf >/dev/null; then
     bindkey '^I' $fzf_default_completion
 fi
 
-command -v direnv 2>&1 > /dev/null && source <(direnv hook zsh)
+(( ${+commands[direnv]} )) && emulate zsh -c "$(direnv export zsh)"
 
 function osc7-pwd() {
     emulate -L zsh # also sets localoptions for us