Initial commit: base slice (auth, roles, users, admin) scaffold

Backend: .NET 10 Clean Architecture + LiteCqrs.Net + EF Core/PostgreSQL +
Identity/JWT. Frontend: React 19 + Vite + TanStack Query/Router + Tailwind v4
with a retro CRT theme. Docker/compose deployment mirroring PnvPanel's
conventions, scoped down to the current base feature set.

backend/src/TeleWave.Api/Common/RateLimiting.cs

@@ -0,0 +1,6 @@
+namespace TeleWave.Api.Common;
+
+public static class RateLimiting
+{
+    public const string AuthPolicy = "auth";
+}