feat(#major); coinbase-wrapped-staked-eth; add subgraph

[dhruv-chauhan]

Adds subgraph for Coinbase Wrapped Staked ETH on

• network: ethereum
• schema: generic (uses generic SDK)
• test deployment: https://okgraph.xyz/?q=Qmdek5dAb1AacAPZ3QynGvFN3g19gEJtdVYvChwkLXed3a

QA (#todo)

• TVL:

Note: Defillama uses cbETH's circulating supply to calculate protocol's TVL. Since we can not deterministically find exact circulating supply, we rely on total supply of cbETH to calculate TVL. Hence the difference. https://api.exchange.coinbase.com/wrapped-assets/CBETH

• Usage:

[dhruv-chauhan]

formatting: https://app.warp.dev/block/5eJ2vCxGYZhSE4Q7w0AECv