refactor: change project layout

- move script as asset because they are not build script
- create new script directory for "User Compile" method because github action need to build with gtest.
- change compile manual for this change.
- modify external dependency location in github action and gitignore.

script/windows_build.bat

@@ -0,0 +1,18 @@
+@ECHO OFF
+
+:: Create build directory and enter it
+MKDIR bin
+CD bin
+:: Create internal build and install directory, then enter it
+MKDIR build
+MKDIR install
+CD build
+
+:: Build with x64 architecture in Release mode
+cmake -A x64 ../..
+cmake --build . --config Release
+cmake --install . --prefix=../install --config Release
+
+:: Back to root directory
+CD ..
+CD ..