Add support for Polkadot Hub EVM

[Mabel-Nguyen]

If you want to integrate a chain, you would need to provide

• Name of the blockchain: Polkadot Hub EVM
• Blockchain providers:
  https://eth-rpc.polkadot.io/
  https://services.polkadothub-rpc.com/mainnet/
• Metadata of the blockchain: https://docs.polkadot.com/smart-contracts/connect/#networks-details
• Logo of the blockchain: https://www.figma.com/design/z9s6aLTLoUdjMwoXLyWcPz/01.SubWallet-Project-Logo?node-id=28-48&t=exbkdqHXMEkR1HSN-4
• Block explorers (if possible): https://blockscout.polkadot.io/

For more details on Polkadot Hub EVM, please see:

• https://docs.polkadot.com/smart-contracts/connect/#networks-details
• https://docs.polkadot.com/node-infrastructure/run-a-node/polkadot-hub-rpc/#api-endpoints
• https://docs.polkadot.com/node-infrastructure/run-a-node/polkadot-hub-rpc/#ethereum-rpc-compatibility

[MaiThuongNinni]

Version test: https://file.cdmteck.com/s/iJR48rCwGqPNqXS

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