No install instructions for VS Code users using Roslynator

[FairlySadPanda]

Describe the bug
https://marketplace.visualstudio.com/items?itemName=josefpihrt-vscode.roslynator

Roslynator is a handy set of static analysers which doesn't play nicely wth the install instructions in the readmes. I'm currently unable to use these rules because of this. It'd be nice to have an explanation about how to use this set of rules with Roslynator's.

[mika-f]

After installing Roslynator in Visual Studio Code, I confirmed that it doesn't work correctly.
I've confirmed that both work with the same installation method as Rider, so I'll think about it for a moment.

[mika-f]

I have written in the OmniSharp section how to use UdonRabbit Analyzer with other Analyzers.
I also provided a VS Code extension that performs the same action automatically (UdonRabbit.Analyzer.VSCode.vsix in the latest release).
It would be great if you could check if this works correctly.

https://github.com/mika-f/UdonRabbit.Analyzer/blob/develop/docs/getting-started/omnisharp.md