Runs the command via `sh -c` so shell features (pipes, redirects, etc.)
work as expected. Captures both stdout and stderr.

Args:
    vm: Name of the host (as configured in hosts.toml).
    command: Shell command to execute.
    workdir: Working directory on the remote host (default: /).
    timeout: Maximum seconds to wait (default: 120).

Returns:
    Command output with stdout, stderr, and exit code.

Args:
    vm: Name of the host (as configured in hosts.toml).
    path: Absolute path to the file on the remote host.

Returns:
    File contents as a string, or an error message.

Handles arbitrary content safely by piping through SSH stdin.

Args:
    vm: Name of the host (as configured in hosts.toml).
    path: Absolute path where the file should be written.
    content: The content to write to the file.

Returns:
    Success confirmation or error message.

Args:
    vm: Name of the host (as configured in hosts.toml).
    local_path: Path to the file on the local host.
    remote_path: Absolute destination path on the remote host.

Returns:
    Success confirmation or error message.

Args:
    vm: Name of the host (as configured in hosts.toml).
    remote_path: Absolute path to the file on the remote host.
    local_path: Destination path on the local host.

Returns:
    Success confirmation or error message.

Args:
    vm: Name of the VM or container.
    name: Name for the snapshot (alphanumeric, hyphens, underscores).

Returns:
    Success confirmation or error message.

Args:
    vm: Name of the VM or container.
    snapshot: Name of the snapshot to restore.

Returns:
    Success confirmation or error message.

Returns state (running/stopped), IP address, resource usage,
and available snapshots.

Args:
    vm: Name of the VM or container.

Returns:
    Formatted status information or error message.

Returns:
    Formatted list of all instances, or a message if none exist.