* Update all CMakeLists of extensions to use clang-format
* Run clang-format on all Extensions
* Update GDCore CMakeLists.txt to add clang-format
* Run clang-format on GDCore files
* Update GDJS and GDCpp CMakeLists.txt to add clang-format
* Run clang-format on GDCpp and GDJS files
* Fix unicode paths on Windows for XML files
* Add a fstream equivalent that supports gd::String paths (with characters outside the current codepage on Windows)
* Add a sf::InputStream subclass for the same purpose
* Use gd::FileStream in DatFile and ResourcesLoader
* Replace remaining i/ofstream with gd::FileStream