feat(ci): update build workflow for draft release process (#87)

Author: BenjaminAbt

.github/workflows/main-build.yml

@@ -45,6 +45,23 @@ jobs:
             echo "✅ Tag $TAG does not exist yet"
           fi
 
+      - name: Remove old packages from existing draft
+        if: steps.check-tag.outputs.exists == 'false'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TAG="v${{ needs.build-and-test.outputs.version }}"
+          # Check if draft release already exists
+          if gh release view "$TAG" &>/dev/null; then
+            echo "🗑️ Removing old NuGet packages from existing draft..."
+            gh release view "$TAG" --json assets -q '.assets[] | select(.name | endswith(".nupkg")) | "\(.id) \(.name)"' | while read -r asset_id asset_name; do
+              echo "Deleting old package: $asset_name (ID: $asset_id)"
+              gh api --method DELETE "/repos/${{ github.repository }}/releases/assets/$asset_id" || echo "Failed to delete $asset_name"
+            done
+          else
+            echo "No existing draft release found"
+          fi
+
       - name: Create/Update Draft Release
         if: steps.check-tag.outputs.exists == 'false'
         uses: release-drafter/release-drafter@v6
@@ -64,16 +81,9 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           TAG="v${{ needs.build-and-test.outputs.version }}"
-          # Wait a moment for the release to be created
+          # Wait a moment for the release to be created/updated
           sleep 2
 
-          # Remove old NuGet packages from the draft release
-          echo "🗑️ Removing old NuGet packages..."
-          gh release view "$TAG" --json assets -q '.assets[] | select(.name | endswith(".nupkg")) | "\(.id) \(.name)"' | while read -r asset_id asset_name; do
-            echo "Deleting old package: $asset_name (ID: $asset_id)"
-            gh api --method DELETE "/repos/${{ github.repository }}/releases/assets/$asset_id" || echo "Failed to delete $asset_name"
-          done
-
           # Upload new artifacts to the draft release
           echo "📦 Uploading new NuGet packages..."
           for file in ./artifacts/*.nupkg; do