Plugin can't call itself

Nobody has claimed this yet.

Hi,
I have been using xbar for a while to easily connect/disconnect from a VPN.
Lately, the script stopped functioning.
I'm on macOS 13.6.2.

The following dummy plugin reproduces the problem; it is supposed to toggle a variable but does not work:

```
#!/usr/bin/env bash
STATUS=NA

case "$1" in
on)
STATUS=1
;;
off)
STATUS=0
;;
esac

if [ "$STATUS" == "1" ]; then
echo "Status: $STATUS"
echo '---'
echo "Turn off | bash='$0' param1=off terminal=false refresh=true"
exit
else
echo "Status: $STATUS"
echo '---'
echo "Turn on | bash='$0' param1=on terminal=false refresh=true"
exit
fi
```
The issue seems to be that the plugin fails to call itself for action (bash=$0).

Any help on how to solve this would be appreciated. :-)

Start by running the provided Bash plugin on macOS 13.6.2 and compare the self-call action using bash='$0' with a known working xbar plugin. Trace how xbar handles bash actions and refresh parameters; done means the plugin can toggle between on and off and refresh its displayed status.

Written by the indexing model from the issue text.