maint: add deploy workflow

.github/workflows/build.yml

@@ -107,3 +107,31 @@ jobs:
           name: Linux ${{matrix.configuration}} ${{matrix.arch}} binaries
           path: |
             build/bin/${{matrix.arch}}/${{matrix.configuration}}/iw4-validator
+
+  deploy:
+    name: Deploy artifacts
+    needs: [build-linux, build-win]
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/master')
+    steps:
+      - name: Setup main environment
+        if: github.ref == 'refs/heads/master'
+        run: echo "ALTERWARE_MASTER_PATH=${{ secrets.ALTERWARE_MASTER_SSH_PATH }}" >> $GITHUB_ENV
+
+      - name: Download Release binaries
+        uses: actions/download-artifact@v3.0.2
+        with:
+          name: Windows Release x64 binaries
+
+      # Set up committer info and GPG key
+      - name: Install SSH key
+        uses: shimataro/ssh-key-action@v2.5.1
+        with:
+          key: ${{ secrets.ALTERWARE_MASTER_SSH_PRIVATE_KEY }}
+          known_hosts: 'just-a-placeholder-so-we-dont-get-errors'
+
+      - name: Add known hosts
+        run: ssh-keyscan -H ${{ secrets.ALTERWARE_MASTER_SSH_ADDRESS }} >> ~/.ssh/known_hosts
+
+      - name: Upload iw4-validator binary
+        run: rsync -avz iw4-validator.exe ${{ secrets.ALTERWARE_MASTER_SSH_USER }}@${{ secrets.ALTERWARE_MASTER_SSH_ADDRESS }}:${{ env.ALTERWARE_MASTER_PATH }}/tools/