[Workers AI] Added workers ai to workers pricing

[daisyfaithauma]

Summary

• AddedWorkers AI to Workers pricing

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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• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.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.

[cloudflare-workers-and-pages]

Deploying cloudflare-docs with    Cloudflare Pages

Latest commit:	14a1234
Status:	✅  Deploy successful!
Preview URL:	https://35489497.cloudflare-docs-7ou.pages.dev
Branch Preview URL:	https://workers-ai-pricing.cloudflare-docs-7ou.pages.dev

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[github-actions]

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/platform/pricing/	https://workers-ai-pricing.cloudflare-docs-7ou.pages.dev/workers/platform/pricing/

[daisyfaithauma]

This will be done at a later date.