fix: Installation instructions and build pipeline
Doc
- Adjust MSYS installation path
- Clarified usage of conan profile
- Fixed PYTHON_EXECUTABLE environment variable
- Add missing paragraph about PYTHON_EXECUTABLE (linux)
- Add missing and remove outdated packages
- Minor improvements of 15_prepare_thirdParty.sh
- Adjusted toolchain for boost, so that b2 doe not build with MSVC
- Add toolchain generator to windows profile for bzip