Add artifact upload release workflow

.github/workflows/build-all.yml

@@ -131,3 +131,25 @@ jobs:
          - linux
       uses: ./.github/workflows/dotnet-maui.yml
       secrets: inherit
+
+   upload-build-artifacts:
+      needs:
+         - android
+         - macos
+         - windows
+         - wasm
+         - linux
+         - windows-vulkan
+         - linux-vulkan
+         - windows-openvino
+         - linux-openvino
+         - windows-no-avx
+         - linux-no-avx
+      if: >
+         (github.event_name == 'push' || github.event_name == 'workflow_dispatch') &&
+         (github.ref == 'refs/heads/main')
+      permissions:
+        contents: write
+      uses: ./.github/workflows/upload-build-artifacts.yml
+      secrets: inherit
+

.github/workflows/upload-build-artifacts.yml

@@ -0,0 +1,54 @@
+name: Upload Build Artifacts
+
+permissions:
+  contents: write
+
+on:
+  workflow_call:
+
+jobs:
+  upload-artifacts:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check for existing release with same commit
+        id: check-release
+        run: |
+          COMMIT=${{ steps.release-info.outputs.commit }}
+          if gh release list --limit 100 --json tagName --jq ".[] | select(.tagName | contains(\"${COMMIT}\"))"; then
+            echo "release_exists=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "release_exists=false" >> "$GITHUB_OUTPUT"
+          fi
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+      - name: Download Artifacts
+        if: steps.check-release.outputs.release_exists != 'true'
+        id: download-artifact
+        uses: actions/download-artifact@v4
+        with:
+          merge-multiple: true
+          path: runtime-artifacts
+
+      - name: Zip Artifacts
+        if: steps.check-release.outputs.release_exists != 'true'
+        run: |
+             zip -r native-runtimes.zip runtime-artifacts
+
+      - name: Set release info
+        id: release-info
+        run: |
+          echo "date=$(date -u +'%Y%m%d-%H%M')" >> "$GITHUB_OUTPUT"
+          echo "commit=$(git -C whisper.cpp rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"
+
+      - name: Create preview release
+        if: steps.check-release.outputs.release_exists != 'true'
+        uses: ncipollo/release-action@90dc22b77f7e5e8d3a3a92924b18415dca53f445
+        with:
+          tag: preview-${{ steps.release-info.outputs.date }}-${{ steps.release-info.outputs.commit }}
+          name: Preview ${{ steps.release-info.outputs.date }} (${{ steps.release-info.outputs.commit }})
+          artifacts: native-runtimes.zip
+          prerelease: true
+