v0.1.1

Features

• Terminal auth (--setup): interactively collect and save the Codebuff API
  key. The agent now advertises a terminal auth method (args: ["--setup"])
  in its initialize response, so ACP clients (e.g. Zed) can offer a
  "Configure Codebuff" action. The key is stored at
  ~/.codebuff-acp/config.json; CODEBUFF_API_KEY still takes precedence.
  Required for listing in the
  ACP registry.