Add editorconfig rules for Kotlin

.editorconfig

@@ -7,6 +7,13 @@ indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
+[*.{kt,kts}]
+ij_kotlin_imports_layout = *
+ij_kotlin_allow_trailing_comma = true
+ij_kotlin_allow_trailing_comma_on_call_site = true
+ij_kotlin_packages_to_use_import_on_demand = unset
+ktlint_code_style = intellij_idea
+
 [*.md]
 trim_trailing_whitespace = false