Codechange: [Actions] Setup vcpkg via a composite action

.github/actions/setup-vcpkg/action.yaml

@@ -0,0 +1,25 @@
+name: 'Setup vcpkg'
+description: 'Installs vcpkg and initialises binary caching via NuGet'
+inputs:
+  vcpkg-location:
+    description: 'Where to install vcpkg'
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install vcpkg
+      shell: bash
+      run: |
+        git clone https://github.com/microsoft/vcpkg "${{ inputs.vcpkg-location }}"
+        cd "${{ inputs.vcpkg-location }}"
+        ./bootstrap-vcpkg.$(if [ "${{ runner.os }}" = "Windows" ]; then echo "bat"; else echo "sh"; fi) -disableMetrics
+
+    - name: Setup vcpkg caching
+      uses: actions/github-script@v7
+      with:
+        script: |
+          core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+          core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+          core.exportVariable('VCPKG_BINARY_SOURCES', 'clear;x-gha,readwrite')
+