[experimental]: GraphQL Data Fetching Support

[ahuseyn]

Implement and test experimental GraphQL data fetching using the new Faust template hierarchy.

Establish a foundation for frontend-agnostic data fetching that leverages the Faust template hierarchy, enabling flexibility across different rendering frameworks.

• Integrate Faust’s GraphQL layer with the new template hierarchy structure.
• Ensure compatibility with existing adapters (Apollo, SvelteKit, Next.js).
• Identify opportunities for improving how data is resolved and passed to templates.

[ahuseyn]

Working branch: https://github.com/wpengine/faustjs/tree/next-add-data-fetching