chore: add ~/stacks to PATH

.zshrc

@@ -46,6 +46,10 @@ if [ -d "$HOME/scripts" ]; then
   export PATH="$HOME/scripts:$PATH"
 fi
 
+if [ -d "$HOME/stacks" ]; then
+  export PATH="$HOME/stacks:$PATH"
+fi
+
 if [ -n "$BASH_VERSION" ]; then
     # include .bashrc if it exists
     if [ -f "$HOME/.bashrc" ]; then