Add async init for collections

LeStorage/BaseCollection.swift

@@ -65,6 +65,11 @@ public class BaseCollection<T: Storable>: SomeCollection, CollectionHolder {
     /// Sets a max number of items inside the collection
     fileprivate(set) var limit: Int? = nil
 
+    init(store: Store) async {
+        self.store = store
+        await self.loadFromFile()
+    }
+    
     init(store: Store, indexed: Bool = false, inMemory: Bool = false, limit: Int? = nil, synchronousLoading: Bool = false) {
         if indexed {
             self._indexes = [:]

LeStorage/Store.swift

@@ -115,6 +115,13 @@ final public class Store {
         return collection
     }
     
+    func synchronizedCollectionWithFileLoading<T : SyncedStorable>() async -> SyncedCollection<T>  {
+        let collection = await SyncedCollection<T>(store: self)
+        self._collections[T.resourceName()] = collection
+        self.storeCenter.loadApiCallCollection(type: T.self)
+        return collection
+    }
+    
     /// Registers a singleton object
     /// - Parameters:
     ///   - synchronized: indicates if the data is synchronized with the server