vcpkg -cache action

.github/workflows/desktop-build.yml

@@ -387,6 +387,12 @@ jobs:
           VCPKG_DEFAULT_TRIPLET: 'x64-windows'
           VCPKG_DISABLE_METRICS: 1
 
+      - name: Setup vcpkg cache
+        id: vcpkg-cache
+        uses: TAServers/vcpkg-cache@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build Cockatrice
         id: build
         shell: bash
@@ -395,6 +401,8 @@ jobs:
           CMAKE_GENERATOR: '${{env.CMAKE_GENERATOR}}'
           CMAKE_GENERATOR_PLATFORM: 'x64'
           QTDIR: '${{github.workspace}}\Qt\${{matrix.qt_version}}\${{matrix.qt_arch}}'
+          VCPKG_FEATURE_FLAGS: 'binarycaching' # Possibly redundant, but explicitly sets the binary caching feature flag
+          VCPKG_BINARY_SOURCES: 'clear;files,${{ steps.vcpkg-cache.outputs.path }},readwrite'
         # No need for --parallel flag, MTT is added in the compile script to let cmake/msbuild manage core count,
         # project and process parallelism: https://devblogs.microsoft.com/cppblog/improved-parallelism-in-msbuild/
         run: .ci/compile.sh --server --release --test --package