feature/editor-config

[baywet]

I've been fighting with tabs and spaces for a while now. This comes from the very good suggestion from @pschaeflein

[zengin]

This is useful for handcrafting files in this repo, but I don't think it will fix the auto-generated files.

I think we should start from MSGraph-SDK-Code-Generator repo. Most code we generate there is using spaces (width: 4). I would suggest setting the standard to that for minimal effect on file history.

[baywet]

@zengin thanks for the suggestion. I've added a configuration for tt files as well on the generator. microsoftgraph/MSGraph-SDK-Code-Generator#336
It only seems to work when opening VS in folder mode and for the part that's not specific (only the CSharp that's not part of the template text gets indented). But it should come handy as we switch to dotnet-core and vs code for the generator.