Enhance API with GraphQL Support

[nickna]

Description:

Enhance Neighborly's API by adding support for GraphQL to allow more flexible and efficient queries.

Tasks:

• Set up a GraphQL server in Neighborly.
• Define GraphQL schemas and resolvers for querying vector data.
• Write documentation and examples demonstrating how to use the GraphQL API.

Resources:

• GraphQL .NET
• GraphQL Specification

Impact:

GraphQL support will make Neighborly's API more flexible and efficient, enabling clients to request exactly the data they need and reducing over-fetching.