Adjust build script for native IDE building

[JakubFornadel]

Task Description

Adjust build script users who do not want to run build.sh, but rather use IDE cmake build process. Existing issue on macOS:

• if clang is installed through both brew and xcode, build will not work because those 2 clangs are not binary compatible anc conan is using xcode clang. To fix that, this section must be added to the conan clang profile:

[buildenv]
CC=/opt/homebrew/opt/llvm@18/bin/clang
CXX=/opt/homebrew/opt/llvm@18/bin/clang++

, which is equivalent to

if [ "$(uname)" == "Darwin" ]; then
    export CC=/opt/homebrew/opt/llvm@${LLVM_VERSION}/bin/clang
    export CXX=/opt/homebrew/opt/llvm@${LLVM_VERSION}/bin/clang++
else
    export CC=clang-${LLVM_VERSION}
    export CXX=clang++-${LLVM_VERSION}
fi

from build script.

Overall to make the code built on macOS without build script:

1. Add [buildenv] section to conan clang profile
2. Manually run conan install, e.g. conan install . -s "build_type=Release" -s "&:build_type=RelWithDebInfo" --profile:host=clang --profile:build=clang --build=missing --output-folder=cmake-build-relwithdebinfo
   in case of removing build directory

• Adding [buildenv] section to conan clang profile would not hurt anything evethough the same thing is already set in build script through export CC/CXX. For people who don't run the script it is useful though
• moving conan install command to config.sh would work only if ${BUILD_DIR} and other variables used on that command would be properly set. They are not if you run it manually so it always choose build/ directory instead of what IDE is using, e.g. cmake-build-relwithdebinfo in my case

Epic Parent