add support for Db Seeder, Fix GraphQL Generic Usage ...

Configuration/XDataBaseConfiguration.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using xDataService.Constants;
 
 namespace xDataService.Configuration
@@ -17,6 +18,12 @@ namespace xDataService.Configuration
         /// Connection String which provide Requires Data to Connect to Db Provider ...
         /// </summary>
         /// <value></value>
-        public string ConnectionString { get; set; }        
+        public string ConnectionString { get; set; }
+
+        /// <summary>
+        /// Holds Seeding items ...
+        /// nameof(TEntity) => TEntity
+        /// </summary>
+        public IDictionary<string, List<dynamic>> SeedItems { get; set; } = new Dictionary<string, List<dynamic>>();
     }
 }