Win ci

• Add windows CI
• Move pip install from test phase to build phase

.gitlab/ci/build.gitlab-ci.yml

@@ -163,7 +163,7 @@ build:windows_cpp:
     - $DEPENDENCY_NAME="aidge_core"
     - $DEPENDENCY_JOB="build:windows_cpp"
     - !reference [.download_dependency_windows, script]
-
+    - Remove-Item .\build_cpp\ -Recurse -Force -ErrorAction Ignore
 
     - $env:CMAKE_PREFIX_PATH = '../install_cpp'
     - mkdir -p build_cpp