Add UNKNOWN case
MODIFY
src/commands_install.cpp
src/commands_install.cpp
@@ -311,6 +311,7 @@ namespace vcpkg::Commands::Install
install_package(paths, action.plan.binary_pgh.value_or_exit(VCPKG_LINE_INFO), &status_db);
System::println(System::Color::success, "Installing package %s... done", action.spec);
break;
+ case InstallPlanType::UNKNOWN:
default:
Checks::unreachable(VCPKG_LINE_INFO);
}

Add UNKNOWN case