feat(#major); stcelo; add subgraph

[dhruv-chauhan]

Adds subgraph for stCELO on

• network: celo
• schema: generic (uses generic SDK)
• test deployment: https://okgraph.xyz/?q=QmafL4AdHgp4pxeDd2S4aH2fubgEurgM4CmHhrCzxNYSHD

QA

• TVL:

  

  (price data feed available since Jun-01-2023)

  

• Usage:

  

• Revenue No fee charged by the protocol at the moment: https://docs.stcelo.xyz/faq#roedptq5yf0v