Changes:
- Add GitHub Actions workflow for PyPI publishing (trusted publishing)
- Add Docker container support with ghcr.io publishing
- Multi-arch container images (linux/amd64, linux/arm64)
- Use astral-sh/uv:python3.12-alpine as base image
- Update README with PyPI badges and Docker usage instructions

Container:
  docker pull ghcr.io/ace-iot-solutions/ace-bbmd-manager:0.3.2

PyPI:
  pip install ace-bbmd-manager==0.3.2

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