chore: partially migrate deployment to cf

[MattieTK]

Summary

Partially migrates the Cloudflare Docs Worker from Wrangler to the new cf CLI. Production now builds through the Cloudflare Vite plugin using cloudflare.config.ts and deploys the generated Build Output with cf deploy --prebuilt.

Wrangler remains only where equivalent high-level cf integration is not yet available: Workers test configuration, Worker type generation, and PR preview deployment packaging. The preview workflow currently relies on:

wrangler deploy \
  --config wrangler.preview.json \
  --dispatch-namespace preview-deployments \
  --name "<script-name>"

cf dispatch-namespaces scripts update <script-name> supports low-level Workers for Platforms uploads, but cf deploy does not accept a dispatch namespace or script name. Equivalent support should preserve cf deploy's Build Output, static asset, binding, compatibility, and observability handling while targeting the named namespace script.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/.github/	@cloudflare/content-engineering, @kodster28, @mvvmm, @colbywhite, @ahaywood, @MohamedH1998
*	@cloudflare/product-owners
*.ts	@cloudflare/content-engineering, @kodster28
*.js	@cloudflare/content-engineering, @kodster28
package.json	@cloudflare/content-engineering

[github-actions]

Preview URL: https://8f8fbf1b.preview.developers.cloudflare.com
Preview Branch URL: https://chore-partial-cf-migration.preview.developers.cloudflare.com

[kodster28]

Just putting a placeholder here, definitely should discuss before we'd get close to merging any of this.