Docs: Add more cross linking with the Astro Docs

[mProjectsCode]

What version of starlight are you using?

0.12.0

What is your idea?

On Starlight docs pages, add more links to related Astro docs pages.

Why is this feature necessary?

Since Starlight is built on top of Astro, Starlight requires knowledge of Astro. Adding all the necessary knowledge to the Starlight docs would result in a lot of duplication and would make the docs harder to maintain.

Do you have examples of this feature in other projects?

The Starlight docs page for markdown only links to a specific section of the Astro docs page for markdown in one place under Advanced Configuration. I think that it would be an improvement to add a bit more crosslinking to the Starlight Docs.

Participation

• I am willing to submit a pull request for this feature.

[mProjectsCode]

I am not a docs writer and relatively new to Starlight, but i can try to write a PR for this.

[delucis]

Thanks for the suggestion @mProjectsCode! I think this could definitely be helpful wherever there are places where the Astro docs would provide useful additional context.