Nesting in Spring symbols view

[martinlippert]

It would be nice if the Spring Symbols view grouped items by scope. In other words, the view set to Workspace scope could group the elements by Spring project. A level below could nest by Stereotypes (Controller, Services, Configuration classes, Configuration properties etc.). Additional, logical nodes could be introduced as well: configuration properties, request mappings, query methods etc. If the scope is switched to Project, the same nested groupings could be applied.

The same applies to the beans view in the boot dashboard in VSCode and/or the new Spring structural view.

(cc @odrotbohm)