Add an EditorConfig file
Add an EditorConfig (.editorconfig) file to this repo.
Motivation:
EditorConfig helps maintain consistent coding styles for multiple developers working on the same project across various editors and IDEs. It will be helpful to add one of these files to swift-testing so that all contributors use the whitespace conventions described in our style guide automatically when using a supported IDE/editor.
Note that Xcode 16 Beta has added support for EditorConfig files — see 20796230 in the release notes.
Checklist:
- [x] Code and documentation should follow the style of the Style Guide.
- [x] If public symbols are renamed or modified, DocC references should be updated.
@swift-ci please test
@swift-ci please test Linux
@swift-ci please test
@swift-ci please test