Thegraph Packages

Types and constants for Estfor Kingdom

`graph-client` implements automatic block tracking using `number_gte` filter of `graph-node`. This automates the process [of fetching and tracking the block number of entites](https://thegraph.com/docs/en/developer/distributed-systems/#polling-for-updated

`graph-client` implements automatic pagination using `first:` and `after:` filters of `graph-node`.