Fix windows on Neon (#1317)

* Build windows ARM

* Remove dispatcher in neon.hpp and neon64.hpp

* Fix set and load_(un)aligned

* Remove deprecated _ex load on MSVC

Author: AntoinePrv

.github/workflows/windows.yml

@@ -145,7 +145,7 @@ jobs:
     - name: Setup compiler
       uses: ilammy/msvc-dev-cmd@v1
       with:
-        arch: amd64
+        arch: arm64
     - name: Setup Ninja
       run: |
         python3 -m pip install --upgrade pip setuptools wheel