chore: update GraphQL setup and static generation

[brunomenezes]

Summary

Making the primary graphQL endpoint as environment variables to cover some forking cases. Also, change the way the type is generated for the ENS static generation.

A few things to notice on that change:

• The Environment variables are already set on Vercel and waiting for deployment (preview / production)
• I will make new setups on Chainstack to get new endpoints after deployment is concluded
• Current development is impacted since each dev needs to deploy their subgraph or re-use the graph-hosted services. But once we move to the decentralised network that will change to environment vars, too.

So the below ENV files would hold your own endpoints as explained in the README.

env.development.local
env.production.local

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[brunomenezes]

cc: @dandheedge @nevendyulgerov That impacts you guys when branching from main (once this PR is merged). So, I would say you have free tiers available on chainstack and/or the graph hosted-service. Or just run locally for whatever network you are developing against.