sqlite: add find method

zero.Sqlite/Operations/DbOperations.Read.cs

@@ -82,6 +82,13 @@ public partial class DbOperations : IDbOperations
   }
   
   
+  /// <inheritdoc />
+  public virtual async Task<T> Find<T>(Expression<Func<T, bool>> querySelector) where T : ZeroIdEntity, new()
+  {
+    return await Db.SingleAsync(querySelector);
+  }
+  
+  
   /// <inheritdoc />
   public virtual async Task<List<T>> LoadBySql<T>(Func<SqlExpression<T>, SqlExpression<T>> querySelector) where T : ZeroIdEntity, new()
   {

zero.Sqlite/Operations/DbOperations.cs

@@ -165,6 +165,11 @@ public interface IDbOperations
   /// </summary>
   Task<List<T>> Load<T>(Expression<Func<T, bool>> querySelector) where T : ZeroIdEntity, new();
 
+  /// <summary>
+  /// Find entity by query
+  /// </summary>
+  Task<T> Find<T>(Expression<Func<T, bool>> querySelector) where T : ZeroIdEntity, new();
+
   /// <summary>
   /// Get entities by sql query
   /// </summary>