docs: document inline comments in _redirects files

[petebacondarwin]

Summary

Documents the new inline comment support for _redirects files, added in cloudflare/workers-sdk#12467.

Changes to src/content/partials/workers/redirects.mdx:

• Adds a new ### Comments subsection documenting both full-line and inline comment syntax
• Explains how inline comments interact with URL fragments (space-delimited # starts a comment; # within a URL like /page#section is preserved)
• Adds a code example demonstrating full-line comments, inline comments, and fragment preservation
• Adds an inline comment to the existing "complete example" block for consistency

Important

Do not merge until the backend is running the new version of workers-shared that includes inline comment support. The feature is implemented in workers-shared (PR) and won't be live until the backend picks up the new package version.

Documentation checklist

• The change adheres to the documentation style guide.

[github-actions]

This PR requires additional review attention because it affects the following areas:

Partials

This PR updates partial files, which are pieces of content used across multiple files in our Render component.

• workers/redirects - view affected files

[petebacondarwin]

This is reapplying #28171 after it got merged too soon.

cc @MattieTK and @vicb

[github-actions]

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

Pattern	Owners
/src/content/partials/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @cloudflare/wrangler, @mattietk

[github-actions]

Preview URL: https://6f036ee5.preview.developers.cloudflare.com
Preview Branch URL: https://devin-1770477989-inline-comments-redirects.preview.developers.cloudflare.com

[github-actions]

Hey there, we've marked this pull request as stale because there's no recent activity on it. This label is helps us identify PRs that might need updates (or to be closed out by our team if no longer relevant).

[github-actions]

Hey there, we've marked this pull request as stale because there's no recent activity on it. This label helps us identify PRs that might need updates (or to be closed out by our team if no longer relevant).