feat(ground-suite): add replay observability console

ground-suite/lib/app/theme.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+ThemeData groundSuiteTheme() {
+  const seed = Color(0xff006c8f);
+  final scheme = ColorScheme.fromSeed(seedColor: seed);
+
+  return ThemeData(
+    useMaterial3: true,
+    colorScheme: scheme,
+    scaffoldBackgroundColor: scheme.surface,
+    visualDensity: VisualDensity.standard,
+    cardTheme: CardThemeData(
+      elevation: 0,
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+    ),
+  );
+}