[Bug/Feature] Unable to get PtgExp (array/shared) formula from xls file

[CuteLicense]

As shown in the attached file, using calamini, the worksheet only found 86 formulas, but there should actually be 805.
readformulas.xls

[tafia]

calamine doesn't support PtgExp (array/shared) formula yet. I'll probably have some time in the coming months, I'll see if I can make it work.

https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-xls/f9aa266f-f1e9-4341-a232-e9f7ec94b8f1

[sftse]

@jmcnamara Please consider reopening this. Having issues which point to gaps where calamine does not cover real-world documents is valuable. This may motivate contributions. It is very hard to otherwise know based on specs and code alone where these gaps are.

[jmcnamara]

Reopened.