docs: add ZoomInfo MCP integration page

[vvemuru]

Summary

• Adds documentation for the ZoomInfo MCP Server integration at docs/integrations/zoominfo.md
• Includes Python and TypeScript agent setup examples using mcp-remote
• Documents all 16 available MCP tools with descriptions
• Adds ZoomInfo logo asset at docs/integrations/assets/zoominfo.png
• Notes OAuth browser flow required on first run

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[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[koverholt]

Thanks for the clean PR and for contributing this integration page to ADK! I made a few minor edits, everything LGTM. You'll need to sign the CLA before we can merge, you can find more information in the failing CLA CI check.

[koverholt]

[docs(integrations/zoominfo): remove redundant Local MCP Server inner tabs

You can actually leave the Local MCP Server inner tabs in place, it's intentional and consistent with the rest of the integration pages and helps users see if it is a local or remote MCP server at quick glance.

[koverholt]

The CLA check is now passing for your email but failing for your username because (I think) the email on your git commits isn't linked to your GitHub account, so the CLA bot can't associate the commits with a signed CLA.

To fix this, add your email address to your GitHub account and/or your git config. GitHub should retroactively link your commits and the check should pass. If that still fails then you might need to rebase or open a new PR.

[koverholt]

Thanks for working through the issues. The integration page is published and live now at: https://adk.dev/integrations/zoominfo/.