[Workers] Adding Zone-level dash buttons

[Oxyjun]

Summary

Screenshots (optional)

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• 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• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.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 pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/workers/ci-cd/	@irvinebroque, @aninibread, @GregBrimble, @kodster28, @cloudflare/pcx-technical-writing, @yomna-shousha
/src/content/docs/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @korinne, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @kodster28, @cloudflare/wrangler, @cloudflare/workers-runtime-1
/src/content/docs/workers/observability/	@irvinebroque, @mikenomitch, @rohinlohe, @kodster28, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://d8b29ea3.preview.developers.cloudflare.com
Preview Branch URL: https://jun-workers-zone-level-dash.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/configuration/routing/custom-domains/	https://jun-workers-zone-level-dash.preview.developers.cloudflare.com/workers/configuration/routing/custom-domains/
https://developers.cloudflare.com/workers/observability/metrics-and-analytics/	https://jun-workers-zone-level-dash.preview.developers.cloudflare.com/workers/observability/metrics-and-analytics/
https://developers.cloudflare.com/workers/configuration/routing/routes/	https://jun-workers-zone-level-dash.preview.developers.cloudflare.com/workers/configuration/routing/routes/
https://developers.cloudflare.com/workers/ci-cd/builds/git-integration/	https://jun-workers-zone-level-dash.preview.developers.cloudflare.com/workers/ci-cd/builds/git-integration/
https://developers.cloudflare.com/workers/examples/103-early-hints/	https://jun-workers-zone-level-dash.preview.developers.cloudflare.com/workers/examples/103-early-hints/