fix(blockchain-api): parameters description for names suggestions

[geekbrother]

This PR adds a description to the name suggestion endpoint in Blockchain-API.

• Description for the query parameters was added,
• Description for the returning object was added.

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Name	Status	Preview	Comments	Updated (UTC)
walletconnect-specs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 17, 2024 2:40pm