Disable clashing min/max macros on Windows

[rkourdis]

On Windows, including "Windows.h" defines min() and max() macros that clash with the STL functions under <algorithm>.

This causes a compilation error on Visual Studio 2022:

FAILED: mjpc/CMakeFiles/libmjpc.dir/utilities.cc.obj 

[...]

C:\[...]\mujoco_mpc\mjpc\utilities.cc(822): error C2589: '(': illegal token on right side of '::'
C:\[...]\mujoco_mpc\mjpc\utilities.cc(822): error C2062: type 'unknown-type' unexpected
C:\[...]\mujoco_mpc\mjpc\utilities.cc(822): error C2059: syntax error: ')'

Defining NOMINMAX before the include disables the definition of these macros, allowing the use of std::max() from <algorithm>.

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[rkourdis]

@nimrod-gileadi Thanks for having a look! I've just rebased to latest main and for some reason it dismissed the review - let me know if we can merge when you have time :))

[thowell]

@rkourdis can you update your branch so we can merge this PR?

[rkourdis]

@thowell Just updated the branch, thanks!