Signing transactions with eth_signTransaction

Currently MetaMask does not allow signing transactions. Will Snaps add support to it? i.e. to send multiple transactions at once

Start by clarifying the requested eth_signTransaction support and whether it should include sending multiple transactions at once. The issue does not identify files, tests, or Snaps entry points, so the first step is to locate the transaction-signing API and determine the intended scope and completion criteria.

Written by the indexing model from the issue text.