Experimenting with making directory listing buttons

[Oxyjun]

Summary

I thought it would be cool to have the individual links a little more polished than a list of hyperlinks.

This only works when we default to the depth=1 level (as it wouldn't make sense to have buttons if we're surfacing higher depth of folders.

Screenshots (optional)

Without button={true} flag:

With button={true} flag:

This also works when there are many items.

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 change adheres to the documentation style guide.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.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
*.astro	@cloudflare/content-engineering, @kodster28
/src/content/docs/style-guide/	@dcpena, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://ce86f8fd.preview.developers.cloudflare.com
Preview Branch URL: https://jun-devdocs-directorylisting-update.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/style-guide/components/directory-listing/	https://jun-devdocs-directorylisting-update.preview.developers.cloudflare.com/style-guide/components/directory-listing/