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/DB/Enums/DatabaseType.cs

@@ -0,0 +1,15 @@
+namespace DataConnection.Enums;
+
+/// <summary>
+/// Tipo di database supportati
+/// </summary>
+public enum DatabaseType
+{
+    SqlServer,
+    MySql,
+    PostgreSql,
+    Oracle,
+    Sqlite,
+    DB2,
+    SapHana
+}

DataConnection/DB/Enums/NamingStrategy.cs

@@ -0,0 +1,12 @@
+namespace DataConnection.Enums;
+
+/// <summary>
+/// Strategia di mappatura dei nomi delle tabelle e colonne
+/// </summary>
+public enum NamingStrategy
+{
+    Default,
+    CamelCase,
+    PascalCase,
+    SnakeCase
+}