add MCB logo and info.json (#2747)

Co-authored-by: Andrew M <35627271+zachzwei@users.noreply.github.com>

blockchains/ethereum/assets/0x4e352cF164E64ADCBad318C3a1e222E9EBa4Ce42/info.json

@@ -0,0 +1,6 @@
+{
+    "name": "MCB",
+    "website": "https://mcdex.io",
+    "short_description": "Monte Carlo Decentralized Exchange is a crypto trading platform. MCDEX is powered by the Mai Protocol smart contracts deployed on the Ethereum blockchain. The Mai Protocol smart contracts are fully audited by Open Zeppelin, Consensys and Chain Security.",
+    "explorer": "https://cn.etherscan.com/token/0x4e352cf164e64adcbad318c3a1e222e9eba4ce42#readContract"
+}