feat(docs): Add baiduyun deploy doc.

[walkthunder]

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docs: Add Baidu Cloud deployment guide for Milvus

• Detailed steps to deploy Milvus on Baidu Cloud CCE
• Includes BOS storage configuration and Helm deployment
• Adds verification and cleanup procedures
• Contains security and resource planning notes

[sre-ci-robot]

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[sre-ci-robot]

Welcome @walkthunder! It looks like this is your first PR to milvus-io/milvus-docs 🎉