Need help with contributing

[Steamcrusher]

To make a contribution i must first compile and run the existing code.
I was using the official guide: https://github.com/eclipse-cdt/cdt/blob/main/CONTRIBUTING.md
And then a few problems have arisen.

1. I was told by Eclipse that my IDE is missing the next natures: com.soyatec.additional.Nature, org.eclipse.cdt.core.ccnature and org.eclipse.cdt.core.cnature.
   Where and how do i find them? There wasn't any info on that in the contribution guide. I've installed eclipse for c++ developers but it didn't fix the problem.
2. During the compilation it tells me that it can't run the program "make". I have cmake installed. How to fix this?
3. In the "Launching" section it tells the next:
   After all the CDT projects have successfully built, you'll probably want to run and/or do source-level debugging of the CDT code. Open the PDE (Plug-in Development Environment) perspective: Window->Perspective->Other->"Plug in Development". There, you'll see a project with the name org.eclipse.cdt.ui, right click the org.eclipse.cdt.ui project, select "Run As"->"eclipse application".
   
   
   

But the "Run As" is missing as you see on the screenshot. What's happening?

Thanks in advance for help.