Add editor config.

Author: andreibancioiu

.editorconfig

@@ -0,0 +1,11 @@
+# See: https://EditorConfig.org
+# VSCode plugin: https://marketplace.visualstudio.com/items?itemName=EditorConfig.EditorConfig
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4