Adds an or condition to the filter.
The or() function adds an inclusive or condition to a WixDataFilter. A filter
with an or returns all the items that match the filter as defined up to
the or function, the items that match the filter passed to the or
function, and the items that match both.
The collections used by both the initial query and the query passed
to the or function must be the same.
The 'or()' function is designed to work with 2 or more queries or filters. If you use it on its own, it will return all the items in a collection.
A filter to add to the initial query as an or condition.