LoadedScripts view: support to show related resources

[weinand]

The debug adapter protocol supports an optional array of "related" resources for every resource (see DAP type Source) object.

An example for these "related" resources is the TypeScript source that is transpiled into JavaScript.

In this feature we will show these related resources as children of a script in the loaded scripts view.

related: #41362

[weinand]

The loaded scripts view shows related resources as children and node-debug (legacy) returns source-map sources as "related resources" via DAP: