Request: Support EditorConfig

[brianary]

Description

It would be nice to be able to define all code style rules in an EditorConfig file, not just the basic ones like line length, but also including extension XML settings like xmlTools.splitAttributesOnFormat and xmlTools.splitXmlnsOnFormat and others (as Microsoft has added EditorConfig code style extensions for .NET).

Current Workarounds

As it is, we currently have to maintain most code styles in an .editorconfig file, and our XML styles in a .vscode/settings.json file.