Suggestion a denote-keyword-append function.

[MirkoHernandez]

I recently updated to denote 3 and I'm not getting used to the newdenote-keyword-addbehavior . I understand that it is much faster for adding and removing multiple keywords, but it is less reliable (a typing error can remove or rename a previous keyword).

And there are also problems with some other packages. I'm using citar-denote and the citar-denote-add-citekey command is broken since it can't append a keyword now, It calls denote-keyword-add with the intention of appending a keyword.

Providing an append function would trivially allow backward compatibility with other packages. Checking the denote version would allow anyone to set the proper function for appending keywords.