Highlight constructor name on invocation for inspector

We have some IDE things like `Show Type Hierarchies` that highlight a range (in this case, the type name - see https://github.com/dart-lang/sdk/issues/62815 for a recent issue around it). I think it would be beneficial for the inspector if we could see the constructor invocation highlighted, too. Not just move the IDE focus to the line where it is, since that can be a bit ambiguous in case of nested similar structures.

CC @DanTup

Start in the DevTools Inspector entry point that handles IDE-driven highlighting, using the Show Type Hierarchies behavior as the comparison described in the issue. Trace how a requested source range is selected, then verify that a constructor invocation—not merely its line or an ambiguous nested location—is highlighted when the feature is complete.

Scritto dal modello di indicizzazione a partire dal testo della issue.