Split getLinksByPath into two methods

[exacs]

This PR:

• Splits and simplifies the function getLinksByPath into two: getPath and getItems
• Changes the return object to allow future extensions (before it was only the metadata, now is an object containing the metadata)
• Adds a locale option in both, especially useful when making breadcrumbs.
• Updates the test page

[Copilot]

Pull Request Overview

This PR refactors the getLinksByPath method by splitting it into two specialized methods: getPath for retrieving ancestor pages (breadcrumbs) and getItems for retrieving child pages. The changes improve API clarity and add locale support for internationalization.

Key changes:

• Split getLinksByPath into getPath and getItems methods with clearer purposes
• Changed return format from bare metadata to objects containing metadata, enabling future extensibility
• Added locale filtering capability via new locales option in GraphGetLinksOptions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
packages/optimizely-cms-sdk/src/index.ts	Exports new GraphGetLinksOptions type
packages/optimizely-cms-sdk/src/graph/index.ts	Implements getPath and getItems methods, adds dedicated GraphQL queries, updates type definitions
packages/optimizely-cms-sdk/src/graph/filters.ts	Adds localeFilter function and extends ContentInput type
test/test-website/src/app/related/[...slug]/page.tsx	Updates usage to new API methods and adjusts data access patterns

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