The implicit role for TH isn't the same as the one computed by browsers

[julienw]

This is computed here: https://github.com/sheremet-va/ivya/blob/56a31c992baab353f82b46f3cadde9292eb3076a/src/roleUtils.ts#L238-L248

In Firefox, this is the related code: https://searchfox.org/firefox-main/rev/644f0db17749554fe23a45b43e77e61f42acdfd9/accessible/html/HTMLTableAccessible.cpp#220-283

I don't know what Chrome does, and I don't know if the library should really mimic the same complex logic.

But I thought I would report it still, in case you'd find this interesting.

[sheremet-va]

This is indeed interesting. This library should follow the same rules as playwright does, so we would have to fix it there first before doing any changes here.