Enable detekt rules UseDataClass and fix existing issues.

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/utils/LogCompositions.kt

@@ -28,10 +28,12 @@ import timber.log.Timber
 @Composable
 fun LogCompositions(tag: String, msg: String) {
     if (BuildConfig.DEBUG) {
-        val ref = remember { Ref(0) }
+        val ref = remember { Ref() }
         SideEffect { ref.value++ }
         Timber.tag(tag).d("Compositions: $msg ${ref.value}")
     }
 }
 
-class Ref(var value: Int)
+private class Ref {
+    var value: Int = 0
+}

tools/detekt/detekt.yml

@@ -60,6 +60,9 @@ style:
     active: true
     acceptableLength: 4
     allowNonStandardGrouping: false
+  UseDataClass:
+    active: true
+    allowVars: false
 
 coroutines:
   GlobalCoroutineUsage: