Simplified Subgraph Deployments

We've significantly simplified the subgraph deployment process. Here's what's changed:

Previously:

• Required deploying a smart contract set
• Required IPFS deployment
• Middleware needed explicit connections to both smart contract set and IPFS
• Subgraphs could only be deployed to middlewares from their connected smart contract set

Now:

• Deploy middlewares independently without a smart contract set or IPFS required
• Deploy subgraphs from any smart contract set to any middleware within an application

Key Benefits:

• Simplified architecture: Reduced deployment complexity and dependencies
• Cost efficiency: Reuse graph middlewares across different smart contract sets
• Enhanced flexibility: Freedom to deploy subgraphs from any smart contract set to any middleware