message: packages/cli: clarify jest module mapper config
diff: @@ -37,6 +37,7 @@ async function getConfig() {
  // To avoid having to build all deps inside the monorepo before running tests,
  // we point directory to src/ where applicable.
  + // For example, @backstage/core = <repo-root>/packages/core/src/index.ts is added to moduleNameMapper
  for (const pkg of packages) {
  const mainSrc = pkg.get('main:src');
  if (mainSrc) {
  