feat: Implement ExistingDatabaseContext for managing existing databases with customizable naming strategies and auto-discovery of entities

feat: Add SqlServerSchemaProvider for extracting database schema information from SQL Server

feat: Introduce DatabaseType and NamingStrategy enums for better database management and naming conventions

feat: Create IDatabaseDiscovery and IDatabaseManager interfaces for database operations and metadata retrieval

feat: Develop REST service client architecture with BaseRestServiceClient and SAP Business One specific implementation

feat: Implement REST service discovery page with UI for connecting to SAP Business One Service Layer and displaying discovered entities

DataConnection/REST/Interfaces/IRestMetadataDiscovery.cs

@@ -0,0 +1,20 @@
+using DataConnection.REST.Models;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace DataConnection.REST.Interfaces
+{
+    /// <summary>
+    /// Interface for discovering metadata (entities, properties) from a REST service.
+    /// </summary>
+    public interface IRestMetadataDiscovery
+    {
+        /// <summary>
+        /// Discovers entities and their properties from the REST service metadata.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>A list of discovered entity information.</returns>
+        Task<List<RestEntityInfo>> DiscoverEntitiesAsync(CancellationToken cancellationToken = default);
+    }
+}