Integrate snowswap with coingeco

[hackfisher]

Refer:

https://www.coingecko.com/en/coins/darwinia-network

[hackfisher]

Changed subswap to snowswap:

https://snowswap.xyz/#/

[nblogist]

https://github.com/orgs/dcdao/discussions/78#discussioncomment-8542743
adding an exchange will require the same process

CC @hackfisher

[hackfisher]

cc @1022ranji Need proof of affiliation with official project.

[1022ranji]

I'll take care of this next week. @nblogist