Move @types/js-yaml to normal dependencies

[raviqqe]

Description

This PR moves the @types/js-yaml package into a normal dependency in the @astrojs/starlight package.

Because we export TypeScript files directly in the exports field in a package.json file of the @astrojs/starlight package, we need to include all dependencies' @types/* packages in normal dependencies. Otherwise, we get following errors on type check of, for example, astro.config.ts even with skipLibCheck: true in tsconfig.json:

node_modules/@astrojs/starlight/utils/translations-fs.ts:4:18 - error TS7016: Could not find a declaration file for module 'js-yaml'. '/Users/raviqqe/src/github.com/raviqqe/stak/doc/node_modules/js-yaml/dist/js-yaml.mjs' implicitly has an 'any' type.
  Try `npm i --save-dev @types/js-yaml` if it exists or add a new declaration (.d.ts) file containing `declare module 'js-yaml';`

4 import yaml from 'js-yaml';

[changeset-bot]

🦋 Changeset detected

Latest commit: 33ec151

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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[delucis]

Thank you @raviqqe!