Add "Build a Remote MCP client" to Guides section

[dinasaur404]

Summary

In the Guides section of the Agents docs, adding a page for building a remote MCP client which redirects to https://github.com/cloudflare/ai/tree/main/demos/mcp-client.

[hyperlint-ai]

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PR Change Summary

Added a new guide for building a remote MCP client in the Agents documentation.

• Introduced a new page titled 'Build a Remote MCP Client' in the Guides section.
• Provided an external link to the MCP client demo on GitHub.
• Included a description for the new guide.

Added Files

• src/content/docs/agents/guides/build-mcp-client.mdx

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[github-actions]

Preview URL: https://98576c42.preview.developers.cloudflare.com
Preview Branch URL: https://add-mcp-client-guide.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/agents/guides/build-mcp-client/	https://add-mcp-client-guide.preview.developers.cloudflare.com/agents/guides/build-mcp-client/

[irvinebroque]

We should make good docs for this one day or at some point add here, but now not yet time as so much changing