Reorganize saving, generate feed

CHDataManagement/Extensions/Array+Split.swift

@@ -0,0 +1,9 @@
+extension Array {
+    
+    func split(into size: Int) -> [[Element]] {
+        guard size > 0 else { return [] }
+        return stride(from: 0, to: count, by: size).map {
+            Array(self[$0..<Swift.min($0 + size, count)])
+        }
+    }
+}