fix(deps): cmake_minimum_required ordering and MSVC 1950+ support for CMake 4.x compat

[BenJule]

Summary

CMake 4.x requires cmake_minimum_required() to appear before project() in deps/CMakeLists.txt. Without this, builds with CMake 4.0+ fail with a fatal error.

Also adds support for the new MSVC 1950+ toolset (Visual Studio 2026 / v144) in deps-windows.cmake, as the existing code only recognized toolsets up to v143.

• deps/CMakeLists.txt: move cmake_minimum_required(VERSION 3.5) before project()
• deps/deps-windows.cmake: add VERSION_GREATER_EQUAL 1950 branch for MSVC v144 toolset detection

[BenJule]

Apologies — this PR was closed by mistake on 2026-06-07, and that was an error on my side, not a deliberate decision to withdraw the change.

It happened as an unintended side effect of a branch cleanup in my fork: deleting the head branch automatically closed this PR. The contribution still stands. I have restored the branch and reopened the PR. Sorry for the noise and any confusion this caused.

[MackBambu]

@lanewei120 LGTM

[lanewei120]

Hi @BenJule
Thanks very much for working on this.

We have recently fixed the github building issues, including CMake 4.x compatibility.
Could you please check whether this patch is still needed?

[BenJule]

Thanks @lanewei120 - checked against current master and both changes are already there: deps/CMakeLists.txt now has cmake_minimum_required(VERSION 3.5) ahead of project(), and deps-windows.cmake already widened the MSVC range to LESS 1970 (1950-1969 = VS 18 / v144). So this patch is fully redundant now, closing. Thanks for the fix!