Add China-VO Archive Query Tool

Dear Astroquery team,

Currently, the China Virtual Observatory has provided data management services for many Chinese telescopes, such as the Large Sky Area Multi-Object Fiber Spectroscopy Telescope and the Einstein Probe. We hope to develop some data query tools based on these data to enrich the Astroquery community. Before proceeding with this work, we would like to know if there is a demand for such features in Astroquery. Thank you~

The issue does not identify repository files, tests, or entry points. Begin by clarifying which China Virtual Observatory services and query capabilities are in scope; an agreed feature scope and defined completion target are needed before implementation can be assessed.

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