Add QLABEL as the label attribute to a column in combine_supp()

[billdenney]

When loading a SAS SDTM dataset, the label comes with the data. When manually inspecting data, the labels are helpful to know what a column means.

I think it would be helpful to have the QLABEL added as a label to the QNAM column which is created with combine_supp().

Would a PR doing this be of interest?

[statasaurus]

Sorry just seen this. It would be great if you can do a PR, or if you would like we are running a r/pharma diversity hackathon the week before r/pharma this year and you could help mentor some people to do this.