Fixing issues I had when trying to build on Windows

[alice]

• The WIN_OUTPUT_DIRECTORY change is because some thing were ending up in build/bin and some things were ending up in build/bin/Release, but they all need to be in the same directory. This ensures that the VS Code generator doesn't get creative with adding /Release on the end of things.
  • https://cmake.org/cmake/help/latest/prop_tgt/RUNTIME_OUTPUT_DIRECTORY.html notes "Multi-configuration generators (Visual Studio, Xcode, Ninja Multi-Config) append a per-configuration subdirectory to the specified directory unless a generator expression is used", so by using a generator expression here we can avoid the per-configuration sneakiness.
• The OUTFILE_DIR for the Python SWIG target is just because it was weird seeing acacia_ia2PYTHON_wrap.cxx end up in build/bin - I came across that while trying to fix the above actual problem
• Splitting the cmake copy command out into its own step is because it wasn't running when it was part of the acacia_ia2.node custom command, and I couldn't figure out why, but this worked.
• The change in binding.gyp.in is a temporary fix for a related problem - iaccessible2.lib ends up in build/third_party/ia2/lib/Release for a Release build, because Visual Studio just tacks Release on the end. Obviously this fix won't work for a Debug build, but we're assuming Release elsewhere already, so we can fix them all at the same time whenever we fix Add a Debug build configuration #178.

[spectranaut]

Hmmm Alice I can't build with these changes, I get the following error:

[build] LINK : fatal error LNK1181: cannot open input file 'C:\Users\spectranaut\repos\AXAccess\build\third_party\ia2\lib\Release\iaccessible2.lib' [C:\Users\spectranaut\repos\AXAccess\build\lib\ia2\build\acacia_ia2.vcxproj]

Before I dig into it -- are you using ninja, by any chance, when on Windows? Or are you just using the msbuild compiler? I switch to ninja at some point and wrote about it in the README, see the "important" here: https://github.com/Igalia/acacia?tab=readme-ov-file#dependencies-1

It's a pain to get the cmake to support both multi configuration generators and single configuration generators, thus the switch to ninja.

[alice]

Ohhh yeah I missed that :( Sorry for the noise. Geez, Windows is touchy.

[spectranaut]

Just want to confirm you can build with windows and ninja's before abandoning this PR?