add VimayX adapter

[SmartHubSolutions]

🏷 Type of documentation

• [x] new bid adapter

📋 Checklist

• [x] Related pull requests in prebid.js or server are linked ->
  https://github.com/prebid/Prebid.js/pull/11874 https://github.com/prebid/prebid-server/pull/3760
• [x] For new adapters check submitting your adapter docs

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