WMI Class browser CodeLens

[radu-stefan-dt]

Summary
It would be useful for those writing WMI extensions to browse the classes available on the local system.

Details
This would be implemented as a code lens over the wmi: node of the manifest. It would allow the user, on click, to load up all classes available on the system. The pulled classes can then be used when writing the WMI queries as part of groups and subgroups.

We already have a good example of running a powershell command and updating the code lens. It might be feasible to extend the current WMIQuery code lens provider to fetch available classes too.

Use Cases
Developers writing WMI extensions may not be 100% familiar with the standard WMI Classes or might want to check what's available on the system. Instead of having to open a terminal and run the gwmi commands themselves, we could offer this as an integrated experience.