Function check_cli_version 

pub async fn check_cli_version(
    cli_path: &Path,
    timeout: Option<Duration>,
) -> Result<String>

Run claude --version and parse the semver string from the output.

The CLI typically prints a line like claude v1.2.3 or just 1.2.3. This function extracts the first semver-like substring (digits and dots).

If timeout is Some, the command is killed after the deadline expires.

Errors

• Error::Timeout if the deadline expires.
• Error::SpawnFailed if the process cannot be launched.
• Error::ProcessExited if the process exits with a non-zero code.
• Error::ControlProtocol if the output cannot be parsed as a version.