Implement WIA scanner plug-in as replacment for the TWAIN plug-in
On Windows we use the TWAIN plug-in to scan images using a scanner. The problem is that it only works in 32-bit due to Microsoft abandoning the TWAIN API in favor of the WIA API.
Recently MSYS2 has also started deprecating MINGW32, which we use to build 32-bit versions of our libraries and GIMP itself.
Since 32-bit apps are getting phased out more and more, we need to replace our plug-in with one that supports the WIA API, which does support 64-bit.