Add configContracts.dangerousFlags for network="default", per-field uiHints,
and configSchema/Zod field descriptions to the MXC sandbox plugin manifest.
Only network is flagged dangerous; containment "process" and "processcontainer"
currently resolve to the same Windows ProcessContainer. Align the manifest
description with the plugin entry and update the config schema test for the new
timeout description.
Copilot-Session: c299e8bd-b71c-4bb4-94a9-9c248543102a
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>