zsh: add fig

zshrc

@@ -1,3 +1,5 @@
+# Fig pre block. Keep at the top of this file.
+[[ -f "$HOME/.fig/shell/zshrc.pre.zsh" ]] && . "$HOME/.fig/shell/zshrc.pre.zsh"
 # Add an entry to PATH, iff it's not already there.
 addpath() {
     wanted_path=$1
@@ -31,3 +33,6 @@ fi
 if [ -f ${HOME}/.zsh.d/local/${HOSTNAME}.zsh ] ; then
     source ${HOME}/.zsh.d/local/${HOSTNAME}.zsh
 fi
+
+# Fig post block. Keep at the bottom of this file.
+[[ -f "$HOME/.fig/shell/zshrc.post.zsh" ]] && . "$HOME/.fig/shell/zshrc.post.zsh"