* Add decldll to proto
* rework init to make it working for MSVC
* fix test_xprs_interface build
dotnet: Fix MSVC shared libs support
* Fix csproj to include libortools.dll
java: Fix MSVC shared_libs support
* Fix runtime jar to include libortools.dll
python: Fix MSVC shared_libs support
* fix __init__.py.in loading for MSVC
note: libprotobuf.dll depends on utf8_validity.dll
when tested it seems WinDLL() will load it so we may only
manually load highs.dll and libprotobuf.dll
which should implicitly load the three others:
abseil_dll.dll, zlib1.dll and utf8_validity.dll
