add llvmlite win builder GH actions workflow

[swap357]

This PR introduces a new GitHub Actions workflow ( llvmlite_win_builder.yml) to automate the building and testing of llvmlite conda package and wheel for win-64 platforms and Python versions.
python versions -
["3.10", "3.11", "3.12", "3.13"]
artifact retention: 7 days

[esc]

Just to clarify, this is:

• A GitHub action
• Building llvmlite on Windows
• Building conda packages

Is that correct?

[esc]

I tried to execute this in my fork:

https://github.com/esc/llvmlite/actions/runs/12828247772/job/35771883647

The error is:

LINK : fatal error LNK1181: cannot open input file 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\DIA SDK\lib\amd64\diaguids.lib' [%SRC_DIR%\ffi\build\llvmlite.vcxproj]

co-pilot says:

The issue appears to be a LINK : fatal error LNK1181: cannot open input file 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\DIA SDK\lib\amd64\diaguids.lib'. This indicates that the required diaguids.lib file cannot be found.

To resolve this issue, you should ensure that the DIA SDK is installed with the Visual Studio Build Tools. Here are the steps to fix it:

Install the DIA SDK: Open the Visual Studio Installer, modify the installed Visual Studio version, and ensure that the "MSVC v142 - VS 2019 C++ x64/x86 build tools" and the "Windows 10 SDK" are installed.

Verify the Path: Check if the diaguids.lib exists in the directory C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\DIA SDK\lib\amd64\.

If the file is missing, installing the necessary components from the Visual Studio Installer should rectify the issue. If the problem persists even after ensuring the DIA SDK is installed, you may need to update the environment variables to include the path to the DIA SDK library.