fix: Broken doctest and test in CI (#267)

Author: benbrandt

Cargo.toml

@@ -20,7 +20,6 @@ unstable_session_list = []
 
 [lib]
 path = "rust/acp.rs"
-doctest = false
 
 [[bin]]
 name = "generate"

rust/acp.rs

@@ -84,10 +84,10 @@ use std::sync::Arc;
 /// # Example
 ///
 /// ```
-/// use agent_client_protocol::SessionId;
+/// use agent_client_protocol_schema::SessionId;
 /// use std::sync::Arc;
 ///
-/// let session_id = SessionId(Arc::from("sess_abc123def456"));
+/// let session_id = SessionId::new("sess_abc123def456");
 /// ```
 ///
 /// See protocol docs: [Session ID](https://agentclientprotocol.com/protocol/session-setup#session-id)