When the wxWidgets sources are in a path containing '++', CMake would
show errors on the command line:
[cmake] RegularExpression::compile(): Nested *?+.
[cmake] RegularExpression::compile(): Error in compile
This happens because the full path was interpreted as a regular
expression when creating the source_groups. Without wxSOURCE_DIR the
regular expressions still match and create correct source groups, so
remove it.
Closes#22738.
Closes#23943.
Add all of the CMake related files together in one group/filter.
This includes the CMakeLists.txt of the project, cmake_pch.[hxx,cxx] when
using CMake's precompiled header feature, and a .rule file created by cotire.
Also include manifest files in the Resource group. Even though they are not
visible (in VS2022), they would create an empty MSW Headers group for samples.
Add CMake build system for libraries, tests and samples
update_files.py converts build/files into CMake format.
build/update-setup-h has been modified to update build/cmake/setup.h.in.
