[suggestion] should we introduce xst

[line-o]

Is your feature request related to a problem? Please describe.

Users browsing the documentation will find mentions of the Java-admin client but might be unaware of the option to use xst to work with eXist-db on the command line.

Describe the solution you'd like

We could add a separate article with a brief introduction how to install and use xst.

Describe alternatives you've considered

Just mention it and link to the projects readme.

Additional context

Where would a good location be to add any of the above?