Publish opendalfs to Anaconda.org

[Xuanwo]

opendalfs is currently published to PyPI. Publish a Conda package to Anaconda.org so users can install it with Conda-compatible package managers.

Acceptance criteria

• Select and document the target Anaconda.org channel/owner.
• Add or submit a package recipe whose Python support and runtime dependencies match the released Python package.
• Publish opendalfs for the platforms supported by its dependency set.
• Verify conda install -c <channel> opendalfs and python -c "import opendalfs" in a clean environment.
• Document or automate how future tagged releases are updated and published.

[Xuanwo]

fsspec is https://anaconda.org/channels/main/packages/fsspec/overview

It's good if we can do conda install main::opendalfs

[Xuanwo]

Just realize that opendal didn't been published to conda yet.