UI: Should allow tag addition on any search result that returns a reference-able entity

We have a use case to associate tags to entities such as columns in hive tables and thereby drive integration with other components that can provide tag based policy enforcement, such as Apache Ranger.

In order to enable a user to associate tags to columns, the UI should allow an "add tag" action on the search results page against entities that are provided in the result list.

For e.g. if we search for hive_column where name=<some_column_name>, we should allow add tags against each column that comes up in the result.