message: [vcpkg] Support \share\<port>\usage to handle libraries which are found through built-in Find Modules.
diff: @@ -565,6 +565,17 @@ namespace vcpkg::Install
  auto& fs = paths.get_filesystem();
  + auto usage_file = paths.installed / bpgh.spec.triplet().canonical_name() / "share" / bpgh.spec.name() / "usage";
  + if (fs.exists(usage_file))
  + {
  + auto maybe_contents = fs.read_contents(usage_file);
  + if (auto p_contents = maybe_contents.get())
  + {
  + System::println(*p_contents);
  + }
  + return;
  + }
  +
  auto files = fs.read_lines(paths.listfile_path(bpgh));
  if (auto p_lines = files.get())
  {
  @@ -595,10 +606,10 @@ namespace vcpkg::Install
  }
  else if (library_targets.size() <= 4)
  {
  - System::println("\nThe package %s provides CMake targets:\n"
  + System::println("The package %s provides CMake targets:\n"
  "\n"
  " find_package(%s REQUIRED)\n"
  - " target_link_libraries(main PRIVATE %s)",
  + " target_link_libraries(main PRIVATE %s)\n",
  bpgh.spec,
  path.parent_path().filename().u8string(),
  Strings::join(" ", library_targets));
  @@ -607,11 +618,11 @@ namespace vcpkg::Install
  {
  auto omitted = library_targets.size() - 4;
  library_targets.erase(library_targets.begin() + 4, library_targets.end());
  - System::println("\nThe package %s provides CMake targets:\n"
  + System::println("The package %s provides CMake targets:\n"
  "\n"
  " find_package(%s REQUIRED)\n"
  " # Note: %d targets were omitted\n"
  - " target_link_libraries(main PRIVATE %s)",
  + " target_link_libraries(main PRIVATE %s)\n",
  bpgh.spec,
  path.parent_path().filename().u8string(),
  omitted,
  @@ -712,7 +723,7 @@ namespace vcpkg::Install
  const InstallSummary summary = perform(action_plan, keep_going, paths, status_db);
  - System::println("\nTotal elapsed time: %s", summary.total_elapsed_time);
  + System::println("\nTotal elapsed time: %s\n", summary.total_elapsed_time);
  if (keep_going == KeepGoing::YES)
  {
  