readCache(loader, options) {
    return manifest.load.load(loader.baseDir, {
      ...options,
      discover: false,
    });
  }
@param {import("../ComponentLoader").ComponentLoader} loader
@param {import("fbp-manifest/dist/lib/list").FbpManifestOptions} options
@returns {Promise<import("fbp-manifest/dist/lib/list").FbpManifestDocument>}