Add Celo Network (Alfajores + Mainnet)

[hiaux0]

Decide which approach

1. Different URL (via env variables)
2. Network Dropdown (via localhost)

TODO

• Should support 4 networks?
  • Favorit: Only show mainnet on prod (testnet on dev/staging
    • because, that's current approach (eg. Gnosis shows all, but we don't want to follow)
• Based on decision add Steps to repro for Bartu
• Make sure you can read from the Celo chain
• Make sure we can interact with the Celo chain (how to make sure?
• Coingecko, make sure prices are taken from Celo and not Ethereum
• Generally, ensure everything works like on Ethereum

Approach

1. just add dropdown with 4 networks (without diffrentiating)
2. ask about celo safe and alfajores -> Celo Safe not on Alfajores

[giladt]

What has been done:

• Added Dropdown for:
  Production environment: Mainnet and Celo (Arbitrum is out of scope for this ticket).
  Development environment: Rinkeby and Alfajores.
• Updated the Token-list for Alfajores in primeAlfajoresPayment
  Celo Token list has been already added by Eugene.
  These token lists are used for propagating the tokens dropdowns in the dApp (wizard, dashboard, etc.).
• Updated Celo and Alfajores contracts to the latest exports from Contracts-V2

For Testing:

• https://prime-launch-staging.vercel.app
  Should show the mainnet networks in the dropdown.
• https://prime-launch-dev.vercel.app
  Should show the test-net networks in the dropdown.

The first (clean) load should show either Mainnet or Rinkeby. After selecting a different network from the dropdown, a local-storage item would be set to save the user's selection for the next app load.