Supported RPC methods

Zerion Wallet supports many standardized Ethereum RPC methods, including:

[eth_requestAccounts](https://docs.cloud.coinbase.com/wallet-sdk/docs/getting-eth-accounts)
[wallet_addEthereumChain](https://docs.cloud.coinbase.com/wallet-sdk/docs/switching-chains) (not yet, WIP)
[wallet_switchEthereumChain](https://docs.cloud.coinbase.com/wallet-sdk/docs/switching-chains)
eth_sendTransaction
eth_accounts
eth_chainId

As well as all standard signing methods: