Initialize CMS application scaffold

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

internal/identity/provider_test.go

@@ -0,0 +1,13 @@
+package identity
+
+import (
+	"context"
+	"testing"
+)
+
+func TestGoogleProviderRequiresConfiguration(t *testing.T) {
+	_, e := (GoogleProvider{}).Authenticate(context.Background(), "")
+	if e == nil {
+		t.Fatal("expected configuration error")
+	}
+}