[AIG]universal endpoint new path

[daisyfaithauma]

Summary

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[github-actions]

This PR changes current filenames or deletes current files. Make sure you have redirects set up to cover the following paths:

• /ai-gateway/providers/universal/

[hyperlint-ai]

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PR Change Summary

Introduced a new universal endpoint documentation and renamed an existing file for better organization.

• Added new documentation for the Universal Endpoint feature.
• Renamed the existing universal.mdx file to improve clarity.

Added Files

• src/content/docs/ai-gateway/universal-endpoint/index.mdx

Renamed Files

• src/content/docs/ai-gateway/universal-endpoint/universal.mdx

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[github-actions]

Preview URL: https://f4dc4e91.preview.developers.cloudflare.com
Preview Branch URL: https://universal-endpoint-path.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/ai-gateway/universal-endpoint/	https://universal-endpoint-path.preview.developers.cloudflare.com/ai-gateway/universal-endpoint/
https://developers.cloudflare.com/ai-gateway/universal-endpoint/universal/	https://universal-endpoint-path.preview.developers.cloudflare.com/ai-gateway/universal-endpoint/universal/

[github-actions]

CI run failed: build logs