[Windows workflow] Compile engine once, link prebuilt for project

[halx99]

Build engine once, linking by every projects

Use steps:

1. Build engine firstly

cd axmol
cmake -B build_x86 -A Win32 -DAX_BUILD_TESTS=OFF
cmake --build build_x86 --config Debug
cmake --build build_x86 --config Release

2. create new project and build with engine prebuilt libs

axmol new -p org.axmol.hellocpp -d D:\dev\projects\ -l cpp --portrait HelloCpp
cd /d D:\dev\projects\HelloCpp
cmake -B build_x86 -A Win32 "-DAX_PREBUILT_DIR=build_x86"
cmake --build build_x86 --config Debug --target HelloCpp
REM run the HelloCpp.exe
run.bat

Notes:

The app build architecture must match with axmol engine build dir

[halx99]

Maybe add a CMakeOptions.md is better, there a other unified options needs docs, see relative issue:
#578

[aismann]

Maybe add a CMakeOptions.md is better, there a other unified options needs docs, see relative issue: #578

Good idea.
Only a link to this CMakeOptions.md on readme or wiki is usefull.
What are you mean?