[Compilation] Use pre-compiled headers for Windows (speed) (#3778)

* Experiment with PCH

* Another run

* GCC test

* Different test

* Another one

* Another one

* Lua headers

* PCH main zone primitives

* Tweaks

* Tweaks

* Tweaks

* Add EQEMU_BUILD_PCH option default to ON

world/CMakeLists.txt

@@ -78,6 +78,10 @@ ADD_EXECUTABLE(world ${world_sources} ${world_headers})
 
 INSTALL(TARGETS world RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
 
+IF (WIN32 AND EQEMU_BUILD_PCH)
+    TARGET_PRECOMPILE_HEADERS(world PRIVATE ../common/pch/pch.h)
+ENDIF ()
+
 ADD_DEFINITIONS(-DWORLD)
 
 TARGET_LINK_LIBRARIES(world ${SERVER_LIBS})