feat: Add Licenses page + SitePageSettingsService

- SitePageSettingsService: new gRPC client for simplified page settings
- Licenses.razor: new page showing license certificates from CMS
- RouteConstants: added Licenses route
- Footer + MainLayout: added Licenses navigation link
- Proto NuGet updated to 0.0.180

src/FrontOffice.Main/Pages/Licenses.razor.cs

@@ -0,0 +1,31 @@
+using FrontOffice.Main.Utilities;
+
+namespace FrontOffice.Main.Pages;
+
+public partial class Licenses
+{
+    private bool _loading = true;
+    private PageSettingsDto? _pageData;
+    private List<PageSettingsImageDto> _licenseImages = new();
+
+    protected override async Task OnInitializedAsync()
+    {
+        try
+        {
+            _pageData = await PageSettingsService.GetPageAsync("licenses");
+
+            if (_pageData != null)
+            {
+                _licenseImages = _pageData.GetImages("licenses");
+            }
+        }
+        catch
+        {
+            // Fallback: page remains null → hardcoded content will render
+        }
+        finally
+        {
+            _loading = false;
+        }
+    }
+}