As per OpenRA PR 21427.
- Added code style rules to .editorconfig - OpenRA PRs 19953, 19976, 20020, 20263, 20264, 20278, 20306, 20364, 20584. - Updated CODE_OF_CONDUCT mention of OpenRA on IRC - OpenRA commit ade5d211e981ecf04f5c38d5eeb10c2ba6cd7307.