Build on Linux/MacOS fails with old packs that contain paths with \ characters

[ReinhardKeil]

Describe the bug

Older packs may have \ characters in path names.

To Reproduce

This example fails to build on Linux and Mac OS because of that: Blank.zip

Expected behavior

csolution should convert \ characters in path names to '/`. The build process should then work.

Environment (please complete the following information):

• CMSIS-Toolbox 2.6.1

Additional context
Problem affects Keil Studio Cloud, but also Desktop Linux and MacOS

[jkrech]

nightly build CMSIS-Toolbox 2024-12-10 on Linux

nightly

(1/1) Setting up context: "Project.Debug+ADuCM320"
[1/1] cd /home/jkrech/projects/workspace/Blank/tmp/1 && /home/jkrech/.vcpkg/artifacts/2139c4c6/tools.kitware.cmake/3.28.4/bin/cmake -E make_directory /home/jkrech/projects/workspace/Blank/out/Project/ADuCM320/Debug && /home/jkrech/.vcpkg/artifacts/2139c4c6/tools.kitware.cmake/3.28.4/bin/cmake -E copy_if_different /home/jkrech/projects/workspace/Blank/tmp/1/compile_commands.json /home/jkrech/projects/workspace/Blank/out/Project/ADuCM320/Debug
Completed: cbuild succeed with exit code 0

2.6.1:

- stderr output is:
CMake Error at CMakeLists.txt:43:
  Parse error.  Function missing ending ")".  Instead found bad character
  with text "\".