message: `vcpkg install` improve status message
diff: @@ -304,13 +304,15 @@ namespace vcpkg::Commands::Install
  Checks::exit_fail(VCPKG_LINE_INFO);
  }
  const BinaryParagraph bpgh = Paragraphs::try_load_cached_package(paths, action.spec).value_or_exit(VCPKG_LINE_INFO);
  + System::println("Installing package %s... ", action.spec);
  install_package(paths, bpgh, &status_db);
  - System::println(System::Color::success, "Package %s is installed", action.spec);
  + System::println(System::Color::success, "Installing package %s... done", action.spec);
  }
  else if (action.plan.plan_type == InstallPlanType::INSTALL)
  {
  + System::println("Installing package %s... ", action.spec);
  install_package(paths, action.plan.binary_pgh.value_or_exit(VCPKG_LINE_INFO), &status_db);
  - System::println(System::Color::success, "Package %s is installed", action.spec);
  + System::println(System::Color::success, "Installing package %s... done", action.spec);
  }
  else
  Checks::unreachable(VCPKG_LINE_INFO);
  