feat: Refactor GraphQL adapter to allow more agent dynamism (#337)

* feat: Refactor GraphQL adapter to allow more agent dynamism

- Removed introspection-based schema handling in favor of direct schema string parsing using `printSchema`.
- Introduced `parseGraphQLSchema` function to extract queries, mutations, and types from the schema.
- Updated service registration to utilize the new parsing logic, improving the handling of GraphQL operations.
- Added new utility functions for peeking at the schema and looking up types.
- Created tests for the new parser functionality and added a sample GraphQL schema for testing.
- Enhanced error handling and input validation for service functions.

* chore: Update GraphQL adapter dependencies and version