* 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
* Declare objects lists used by actions only when actions are launched
for standard events (both GDCpp and GDJS)
* Enable the object list reuse optimisation in GDCpp as done in GDJS.
Florian Rival