fix: add usage comment to fish shell auto-start snippet
+# The following snippet is meant to be used like this in your fish config:
+#
+# if status is-interactive
+# # Configure auto-attach/exit to your likings (default is off).
+# # set ZELLIJ_AUTO_ATTACH true
+# # set ZELLIJ_AUTO_EXIT true
+# eval (zellij setup --generate-auto-start fish | string collect)
+# end
if not set -q ZELLIJ
if test "$ZELLIJ_AUTO_ATTACH" = "true"
zellij attach -c
