Add initial FabWorksDbContext migration that creates the FormPrograms table with FK to BomItems. Existing tables (ExportRecords, BomItems, CutTemplates) are excluded from the migration since they were already created by ExportDXF's ExportDxfDbContext. Also adds EF Core Design package to FabWorks.Api for migration tooling support. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>