3c42222b7e
This change includes the following: - A new `tooling-daemon` CLI command to launch DTD - Minor refactoring of package:dtd_impl to better match expected Dart package structure - Updated build rules to create dart_tooling_daemon.dart.snapshot Change-Id: Idd91bc4ce64ce790db5bad323a50d9cf65523dc2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/344800 Reviewed-by: Dan Chevalier <danchevalier@google.com> Commit-Queue: Ben Konyi <bkonyi@google.com>