Add libtorch to github action

.github/workflows/build.yml

@@ -22,6 +22,13 @@ jobs:
         run: |
           sudo apt-get -y install lcov
           sudo apt-get -y install gcovr
+      - name: Install Libtorch
+        run: |
+          wget https://download.pytorch.org/libtorch/cpu/libtorch-cxx11-abi-shared-with-deps-2.3.1%2Bcpu.zip
+          unzip libtorch-cxx11-abi-shared-with-deps-1.9.0+cpu.zip
+          mv libtorch /usr/local
+          export LIBTORCH=/usr/local/libtorch
+          export Torch_DIR=/usr/local/libtorch
       - name: Tests & build-wrapper
         run: |
           cmake -S . -B build -Wno-dev