Mark as unread: add a feature flag, disabled on release build.

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -75,4 +75,11 @@ enum class FeatureFlags(
         defaultValue = true,
         isFinished = false,
     ),
+    MarkAsUnread(
+        key = "feature.markAsUnread",
+        title = "Mark as unread",
+        description = "Allow user to mark a room as unread",
+        defaultValue = true,
+        isFinished = false,
+    ),
 }

libraries/featureflag/impl/src/main/kotlin/io/element/android/libraries/featureflag/impl/StaticFeatureFlagProvider.kt

@@ -40,6 +40,7 @@ class StaticFeatureFlagProvider @Inject constructor() :
                 FeatureFlags.PinUnlock -> true
                 FeatureFlags.Mentions -> true
                 FeatureFlags.SecureStorage -> true
+                FeatureFlags.MarkAsUnread -> false
             }
         } else {
             false