Add Aurora EVM bridge for Near protocol

Aurora is the EVM bridge for Near protocol which is gaining traction.

Name: ```Aurora```
Symbol: ```ETH```
ChainId: ```1313161554```
RPC: ```https://mainnet.aurora.dev```
Etherscan API: ```https://api.aurorascan.dev/api?```
Etherscan URL: ```https://aurorascan.dev/tx/```
Icon: 
Coingecko chain ID: ```aurora```
Coingecko chainpair: ```aurora```

Name: ```Aurora (Test)```
Symbol: ```ETH```
ChainId: ```1313161556```
RPC: ```https://betanet.aurora.dev```
Etherscan API: ```https://api-testnet.aurorascan.dev/api?```
Etherscan URL: ```https://testnet.aurorascan.dev/tx/```
Icon: 

Uses ```tokentx``` and ```tokennfttx``` in the transfer query same as Etherscan.
Fixed Gas: Unknown (TBD, test it).
Gas Limit: ```6,721,975```