Add support for toggling the built-in search modal using Ctrl+k

[HiDeoo]

What kind of changes does this PR include?

• Changes to Starlight code

Description

Got a few complaints that the shortcut to trigger the search modal was not working on Windows.
Turns out that we are only listening for / and cmd + k but not ctrl + k which is a bit of a standard for web applications.

This PR adds support for ctrl + k to trigger the search modal and aligns the behavior with the Algolia one (and https://docs.astro.build at the same time).

[changeset-bot]

🦋 Changeset detected

Latest commit: ef87b00

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@astrojs/starlight	Patch

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Name	Status	Preview	Updated (UTC)
starlight	✅ Ready (Inspect)	Visit Preview	Mar 20, 2024 10:09am

[Fryuni]

I liked the current behavior because it didn't shadow Chrome's search shortcut, which is also Ctrl+K. So Ctrl is for the browser and Meta is for the site.

But I agree that this is very ubiquitous

[at-the-vr]

I liked the current behavior because it didn't shadow Chrome's search shortcut, which is also Ctrl+K. So Ctrl is for the browser and Meta is for the site.

I suppose you will like Ctrl+L 😉 , the PRs great (LGTM by default)

[delucis]

Thanks for catching and fixing this @HiDeoo! Left one comment, but agree with the code changes 🙌