Support JetBrains Rider IDE as an editor

[djpowell]

Rider is JetBrains .NET IDE, which supports the React plugin identically to other JetBrains IDEs such as Idea and WebStorm.

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[mrmckeb]

@djpowell, does this IDE also need config files added to our template .gitignore files?

[yhnavein]

@djpowell I'm confused - Rider is for working with dotnet solutions. Why would you use for working with CRA?

There is a more suitable Jetbrains product for this kind of projects - WebStorm and it is already handled correctly in this repo.

[djpowell]

@djpowell I'm confused - Rider is for working with dotnet solutions. Why would you use for working with CRA?

There is a more suitable Jetbrains product for this kind of projects - WebStorm and it is already handled correctly in this repo.

WebStorm works great, but the React plugin that WebStorm uses is available to use from IntelliJ Ultimate, Rider, and JetBrain's other IDEs too.

I'm working on a Rider solution containing a C#/ASP.NET project for the server code, and a node project containing a CRA app. This scenario was already supported with IntelliJ for Java, but not in Rider for .NET.

[petetnt]

@mrmckeb Rider uses .idea for solution specific settings similar to other JetBrains products (https://www.jetbrains.com/help/rider/Directory_Based_Settings.html#project-level)

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