Feat: update CLAP / VST CI

.github/workflows/build-windows.yml

@@ -100,16 +100,23 @@ jobs:
           name: cagire-windows-x86_64-msi
           path: target/wix/*.msi
 
+      - name: Prepare plugin artifacts
+        if: inputs.build-packages
+        run: |
+          mkdir -p staging/clap staging/vst3
+          cp -R target/bundled/cagire-plugins.clap staging/clap/
+          cp -R target/bundled/cagire-plugins.vst3 staging/vst3/
+
       - name: Upload CLAP artifact
         if: inputs.build-packages
         uses: actions/upload-artifact@v4
         with:
           name: cagire-windows-x86_64-clap
-          path: target/bundled/cagire-plugins.clap
+          path: staging/clap/
 
       - name: Upload VST3 artifact
         if: inputs.build-packages
         uses: actions/upload-artifact@v4
         with:
           name: cagire-windows-x86_64-vst3
-          path: target/bundled/cagire-plugins.vst3
+          path: staging/vst3/