message: `export`: Place the integration files in the exported folder
  NuGet creation gets them from there now, and they are available for other exports types
diff: @@ -28,11 +28,11 @@ namespace vcpkg::Commands::Export
  </description>
  </metadata>
  <files>
  - <file src="@RAW_EXPORTED_DIR@\**" target="" />
  + <file src="@RAW_EXPORTED_DIR@\installed\**" target="installed" />
  <file src="@RAW_EXPORTED_DIR@\.vcpkg-root" target="" />
  - <file src="scripts\buildsystems\msbuild\applocal.ps1" target="build\native\applocal.ps1" />
  - <file src="scripts\buildsystems\msbuild\vcpkg.targets" target="build\native\@NUGET_ID@.targets" />
  - <file src="scripts\buildsystems\vcpkg.cmake" target="build\native\vcpkg.cmake" />
  + <file src="@RAW_EXPORTED_DIR@\msbuild\applocal.ps1" target="build\native\applocal.ps1" />
  + <file src="@RAW_EXPORTED_DIR@\msbuild\vcpkg.targets" target="build\native\@NUGET_ID@.targets" />
  + <file src="@RAW_EXPORTED_DIR@\vcpkg.cmake" target="build\native\vcpkg.cmake" />
  </files>
  </package>
  )";
  @@ -269,8 +269,17 @@ namespace vcpkg::Commands::Export
  System::println(System::Color::success, "Exporting package %s... done", display_name);
  }
  - const fs::path vcpkg_root_file = (raw_exported_dir_path / ".vcpkg-root");
  - fs.write_contents(vcpkg_root_file, "");
  + // Copy files needed for integration
  + fs.copy_file(paths.root / ".vcpkg-root", raw_exported_dir_path / ".vcpkg-root", fs::copy_options::overwrite_existing, ec);
  + Checks::check_exit(VCPKG_LINE_INFO, !ec);
  + fs.create_directories(raw_exported_dir_path / "msbuild", ec);
  + Checks::check_exit(VCPKG_LINE_INFO, !ec);
  + fs.copy_file(paths.buildsystems / "msbuild" / "applocal.ps1", raw_exported_dir_path / "msbuild" / "applocal.ps1", fs::copy_options::overwrite_existing, ec);
  + Checks::check_exit(VCPKG_LINE_INFO, !ec);
  + fs.copy_file(paths.buildsystems / "msbuild" / "vcpkg.targets", raw_exported_dir_path / "msbuild" / "vcpkg.targets", fs::copy_options::overwrite_existing, ec);
  + Checks::check_exit(VCPKG_LINE_INFO, !ec);
  + fs.copy_file(paths.buildsystems / "vcpkg.cmake", raw_exported_dir_path / "vcpkg.cmake", fs::copy_options::overwrite_existing, ec);
  + Checks::check_exit(VCPKG_LINE_INFO, !ec);
  if (raw)
  {
  