Enable VS Code hover evaluation when debugging

[mhuttenlauch]

This commit adds functionality to display the variable contents when hovering over the names. I find it easier than setting up watches when step debugging.

This example shows hovering over an entire struct:

and this for a struct key access:

It could use some polishing in determining what to show (e.g hovering over local. should show local scope, local.theData should show the struct etc) as well as ironing out the kinks I mentioned in the function comment.

Tested against the most recent Lucee 5.3 and 5.4 releases.

[softwareCobbler]

lgtm! will merge this in, pending minor review fixups. Thanks for the contribution.