Add support for Benqi on Avalanche

[KaymasJain]

Benqi is the fork of Compound protocol which is on mainnet. So the integration will be similar to Compound but tokens (and their addresses) will differ.

The official site of https://benqi.fi/.

The connector name for Benqi is BENQI-A. At the moment, you can follow this doc of Compound for the idea. We'll be adding Benqi connector soon.

To get the details around token 'ETH-A', 'DAI-A', etc check this.