Replaced icons for "Catalogs", "Dashboards", and "MassData" in NavMenu.razor with new custom Bootstrap-style SVG icons. Added corresponding CSS classes using data URIs to embed the new white icons, ensuring consistent appearance in the navigation menu.
Added new Blazor Server project `DbFirst.BlazorWebApp` with core UI components, pages, and static assets. Updated solution file to include the project. Also added `bootstrap.min.css.map` to support CSS debugging in browser developer tools.
