release: v0.3.16 — Linux ARM64 binary, multi-arch Docker, donate link

- Add linux-arm64 to PLATFORM_CHROMIUM_VERSIONS (Python + JS)
- Multi-arch Docker build (linux/amd64 + linux/arm64) via QEMU in CI
- Add ko-fi donate link to welcome banner (Python + JS)
- Version bump to 0.3.16

.github/workflows/publish.yml

@@ -107,6 +107,7 @@ jobs:
         run: |
           VERSION=$(python -c 'import re; print(re.search(r"__version__\s*=\s*[\"'\'']([^\"'\'']+)", open("cloakbrowser/_version.py").read()).group(1))')
           echo "VERSION=$VERSION" >> $GITHUB_ENV
+      - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3
         with:
@@ -117,6 +118,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             cloakhq/cloakbrowser:${{ env.VERSION }}