Add ERC-7846: Wallet Connection API

This is a GitHub pull request thread for ERC-7846, "Wallet Connection API," a proposed JSON-RPC method for wallet connection with extensible optional capabilities built on ERC-5792. The proposal defines one capability that combines connection and authentication into a single interaction, using Sign-In with Ethereum (ERC-4361) with changes such as camelCase field names. Commenters raised concerns that the address should not be part of the signed message for passkey wallets, which would still require two interactions, and that the design is EVM-specific while CAIP-222 covers similar functionality. Reviewers also suggested adding a wallet_disconnect method, which the thread's later comments describe as a needed addition to the existing standard. The thread ends with a note that all reviewers had approved and the pull request was being merged automatically.