Reading from an XLS/XLSX file example in docs

[jakub-gawronski-wttech]

Seems like the documentation is missing an example on "How to read from an XLS/XLSX file, parse it, and perform actions based on cells' value".
There is, however, an example of writing into the XLS file (https://github.com/wttech/acm/blob/main/ui.content.example/src/main/content/jcr_root/conf/acm/settings/script/manual/example/ACME-203_output-xls.groovy) and a similar, closed issue connected #229).

[krystian-panek-vmltech]

will be done, thanks for raising this

[krystian-panek-vmltech]

I have sth working :)

enjoy / #297