Admin UI: Add message queue to admin UI (#6958)

* add a menu item "Message Queue"

* add a menu item "Message Queue"
  * move the "brokers" link under it.
  * add "topics", "subscribers". Add pages for them.

* refactor

* show topic details

* admin display publisher and subscriber info

* remove publisher and subscribers from the topic row pull down

* collecting more stats from publishers and subscribers

* fix layout

* fix publisher name

* add local listeners for mq broker and agent

* render consumer group offsets

* remove subscribers from left menu

* topic with retention

* support editing topic retention

* show retention when listing topics

* create bucket

* Update s3_buckets_templ.go

* embed the static assets into the binary

fix https://github.com/seaweedfs/seaweedfs/issues/6964

weed/filer_client/filer_client_accessor.go

@@ -41,3 +41,18 @@ func (fca *FilerClientAccessor) ReadTopicConfFromFiler(t topic.Topic) (conf *mq_
 
 	return conf, nil
 }
+
+// ReadTopicConfFromFilerWithMetadata reads topic configuration along with file creation and modification times
+func (fca *FilerClientAccessor) ReadTopicConfFromFilerWithMetadata(t topic.Topic) (conf *mq_pb.ConfigureTopicResponse, createdAtNs, modifiedAtNs int64, err error) {
+
+	glog.V(1).Infof("load conf with metadata for topic %v from filer", t)
+
+	if err = fca.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
+		conf, createdAtNs, modifiedAtNs, err = t.ReadConfFileWithMetadata(client)
+		return err
+	}); err != nil {
+		return nil, 0, 0, err
+	}
+
+	return conf, createdAtNs, modifiedAtNs, nil
+}