Add memoized response resolver for linked resources and pagination

[andrepimpao]

Summary

• Add an explicit response resolver for linked entities, collections, and pagination.
• Reuse the originating SDK runtime for authentication, plugins, cache, hooks, decoding, errors, and config.
• Memoize resolved responses within each response graph to avoid duplicate HTTP requests.

Changes

• Add ResolverInterface with get(), entity(), collection(), and envelope().
• Expose the response-graph resolver through hydration Context.
• Preserve query parameters from API-provided links while appending missing API defaults.
• Build memoization keys from the HTTP method and transport-resolved URL.
• Keep memoization isolated between independent top-level SDK requests.