Consider a new design for the info and search methods that avoids conversion of nodes when the lazy_tree option is used

[perrygreenfield]

The new lazy_tree PR #1733 now provides the ability to delay conversion of nodes until they are needed as well as giving finer control of memory use. Unfortunately, any use of the info or search methods forces conversion of all nodes making them costly to use for large data sets. Since much (perhaps all) of the information for these methods is in the raw yaml, it may be possible for a different implementation to avoid dependencies on conversion to show the needed information. When resources permit, this option should be investigated.