Update ssh-agent setup for 1Password in zshrc

The function load-our-ssh-keys in zshrc has been updated to check for the existence of 1Password before setting up the ssh-agent. Now, the ssh-agent will only be initialized for 1Password if it's installed on the system. This change effectively prevents potential errors when 1Password is not available.

zsh/.zshrc

@@ -349,7 +349,10 @@ onepassword-agent-check() {
 }
 
 load-our-ssh-keys() {
-  onepassword-agent-check
+  # setup ssh-agent for 1password only if it's installed
+  if can_haz op; then
+    onepassword-agent-check
+  fi
   # If keychain is installed let it take care of ssh-agent, else do it manually
   if can_haz keychain; then
     eval `keychain -q --eval`
@@ -968,4 +971,4 @@ function zqs() {
 
 if [[ -f ~/.zqs-zprof-enabled ]]; then
   zprof
-fi
+fi