feat: add 9 device-config & task-config tools (SP21 coverage, phase 4)
list_device_parameters, get_device_parameter, set_device_parameter,
export_io_mappings_csv, import_io_mappings_csv, set_device_state
(enable/disable/simulation), get_device_identification, create_task,
configure_task. New shared helper find_device_object.
plug_module/unplug_module deferred: needs a module-slot test device to
verify the connector/index call shape.
API per SP21 ScriptDeviceObject.pyi / ScriptDeviceParameters.pyi /
ScriptTaskConfigObject.pyi.
Plan: docs/superpowers/plans/2026-06-12-sp21-api-coverage.md (phase 4).