Create ENSNode SDK package

[tk-o]

The new SDK includes:

• all Ponder reserved routes:
  • GET /health returns 200 immediately when ponder starts running
  • GET /ready returns 200 when ponder completed historical indexing
  • GET /status returns status object (that we later replay with /GET metadata)
  • GET /metics returns prometheus metrics (we use some with GET /metadata)
• all ENSNode API routes
  • GET /metadata returns ENSNode metadata object (dev-preview)
  • POST /subgraph handles Subgraph-compatible GQL queries
  • POST /ponder handles Ponder GQL queries

Also, the new SDK should not include ENSNode UI routes, even though these are served from ENSNode:

• GET /subgraph returns GraphiQL UI
• GET /ponder returns GraphiQL UI
• GET /swagger returns Swagger UI

Assume we also don’t want to include ENSNode redirect routes:

• GET / redirects to ENSAdmin dashboard with ENSNode Public URL attached as a search param