nitro-tokens

To get tokens refer to /src/{env}/tokens folder eg: /src/mainnet/tokens

Steps to add new tokens

1. Cut a new branch from main.
2. Add tokens in src/mainnet/tokens in specific flows.
3. Add chain in src/mainnet/chainInfo.json if required.
4. Raise PR.

// TODO: add validation and src/mainnet/allTokens.json generation script.