🚀 Major refactor: Reorganize project structure

- Move WebAPI/ → src/Backend/DiunaBI.WebAPI/
- Move Frontend/ → src/Frontend/
- Move Deployment/ → deploy/
- Add proper .NET 8 solution structure
- Add plugin architecture with DiunaBI.Plugins.Morska
- Clean

tools/sql-scripts/utlis/CreateRecord.sql

@@ -0,0 +1,5 @@
+INSERT INTO [diunabi-morska].[dbo].[Records]
+([Id], [Code], [Desc1], [CreatedAt], [ModifiedAt], [CreatedById], [ModifiedById], [IsDeleted], [LayerId])
+VALUES ((SELECT NEWID()), 'GoogleSheetName-Invoices', 'Raport_R2_Faktury_2024',
+        GETDATE(), GETDATE(), '117be4f0-b5d1-41a1-a962-39dc30cce368', '117be4f0-b5d1-41a1-a962-39dc30cce368', 0, 
+        'e5315187-5bcb-496a-8c63-4c6575e7e04c');