Add tag overview, improve assets

CHDataManagement/Model/Item/LocalizedItem.swift

@@ -0,0 +1,19 @@
+
+protocol LocalizedItem {
+
+    associatedtype Localized
+
+    var german: Localized { get }
+
+    var english: Localized { get }
+}
+
+extension LocalizedItem {
+
+    func localized(in language: ContentLanguage) -> Localized {
+        switch language {
+        case .german: return german
+        case .english: return english
+        }
+    }
+}