fix(windows): add /std:c++latest flag for clang-cl to enable std::filesystem

Root cause: clang-cl on Windows Server 2022 with MSVC STL cannot find
std::filesystem without explicit C++ standard flag. The compiler defaults
to an older compatibility mode that only exposes std::experimental::filesystem.

Solution: Add /std:c++latest compiler flag specifically for clang-cl builds
on Windows. This enables proper C++23 standard library support including
std::filesystem from MSVC STL.

The fix is applied via yaze_common interface target in cmake/utils.cmake,
ensuring all targets using yaze_common get the correct flags.

This has blocked Windows releases for 2+ weeks. Fixes compilation errors in:
- src/util/platform_paths.h
- src/util/platform_paths.cc
- src/util/file_util.cc
- All other files using <filesystem>

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmake/utils.cmake

@@ -40,12 +40,28 @@ function(yaze_add_compiler_flags)
 
     # Compiler-specific settings
     if(MSVC)
-        target_compile_options(yaze_common INTERFACE
-            /EHsc
-            /W4 /permissive-
-            /bigobj
-            /utf-8
-        )
+        # Check if we're using clang-cl (Clang with MSVC-compatible command line)
+        if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+            # clang-cl requires explicit /std:c++latest to access C++23 features including <filesystem>
+            # Without this, clang-cl only sees std::experimental::filesystem from older MSVC STL
+            target_compile_options(yaze_common INTERFACE
+                /EHsc
+                /W4 /permissive-
+                /bigobj
+                /utf-8
+                /std:c++latest
+            )
+            message(STATUS "Windows clang-cl: Added /std:c++latest for C++23 and std::filesystem support")
+        else()
+            # Regular MSVC compiler
+            target_compile_options(yaze_common INTERFACE
+                /EHsc
+                /W4 /permissive-
+                /bigobj
+                /utf-8
+            )
+        endif()
+
         target_compile_definitions(yaze_common INTERFACE
             _CRT_SECURE_NO_WARNINGS
             _CRT_NONSTDC_NO_WARNINGS