Adds a delete sequence method

LeStorage/StoredCollection.swift

@@ -178,7 +178,22 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         
     }
     
-    /// Inserts the whole sequence into the items array, no updates
+    /// Deletes all items of the sequence by id
+    public func delete(contentOfs sequence: any Sequence<T>) throws {
+        
+        defer {
+            self._hasChanged = true
+        }
+        
+        for instance in sequence {
+            try instance.deleteDependencies()
+            self.items.removeAll { $0.id == instance.id }
+            self._index?.removeValue(forKey: instance.stringId)
+            try self._sendDeletionIfNecessary(instance)
+        }
+    }
+    
+    /// Inserts or updates all items in the sequence
     public func addOrUpdate(contentOfs sequence: any Sequence<T>) throws {
         defer {
             self._hasChanged = true