Add new price-feed data source

[vuong177]

We utilize a single price-feed source for mesh security, which is the Osmosis TWAP price. By extending the price-feed source, the protocol could become more decentralized, reducing dependency on osmosis. Moreover, it could enhance security by providing more data sources for price data.

The Band Protocol supports [[requesting oracle data over IBC from cw contract. So that it's possible to use band protocol to request price data for consumer contract.

I propose extending the current remote-price-feed contract for support query price data in band-protocol by using their cw-band : https://github.com/bandprotocol/cw-band