Fix MSVC-specific syntax issues

[ZHBHFUT]

Fix MSVC-specific syntax issues

Following up on issue #232 .

This PR refines the previously proposed platform-independent annotation macros and updates the affected declarations to better cooperate with the existing scindent workflow.

Changes since the previous revision:

• Adjusted the placement and formatting of the new macros to avoid confusing GNU indent.
• Verified that scindent runs cleanly on the touched headers without warnings or errors.
• No functional changes compared to the earlier version; this update is strictly about formatting robustness and tool compatibility.

The goal remains to provide a unified, portable way to express attributes such as noreturn and printf-like annotations across compilers, while keeping the resulting code friendly to the current formatting infrastructure.

Please let me know if you would prefer a different placement or style for any of the annotations.

[ZHBHFUT]

For Windows/MSVC users, here is a minimal CMake + vcpkg configure/build/install sequence (x64):

@echo off
setlocal

echo --- Configure (Visual Studio generator) ---
set "VCPKG_ROOT=<your vcpkg folder>"

cmake -S . -B build ^
  -A x64 ^
  -DCMAKE_INSTALL_PREFIX="%CD%\build\install" ^
  -DSC_ENABLE_MPI=ON ^
  -DCMAKE_TOOLCHAIN_FILE="%VCPKG_ROOT%\scripts\buildsystems\vcpkg.cmake" ^
  -DCMAKE_C_FLAGS="/utf-8 /wd4100 /wd4702 /wd4267"

echo --- Build ---
cmake --build build --config Release

echo --- Install ---
cmake --install build --config Release

endlocal

Additional options for building shared libs (DLL) if supported by the project/config:

  -DBUILD_SHARED_LIBS=ON ^
  -DSC_BUILD_SHARED_LIBS=ON ^
  -DCMAKE_C_FLAGS="/DBUILDING_DLL /utf-8 /wd4100 /wd4702 /wd4267"

Note that depending on the checkout location and local filesystem permissions, the install step may require elevated privileges on Windows, even when installing into a subdirectory of the build tree.