feat: rebrand application from Padel Pro to SmashPoint

Complete rename across all layers: UI branding, package names
(@smashpoint/web, @smashpoint/shared), infrastructure (Docker,
DB config), seed data, documentation, and logo/favicon.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/app/layout.tsx

@@ -5,10 +5,10 @@ import "./globals.css";
 const inter = Inter({ subsets: ["latin"] });
 
 export const metadata: Metadata = {
-  title: "Padel Pro",
+  title: "SmashPoint",
   description: "Sistema de Gestión para Clubes de Pádel",
   keywords: ["padel", "club", "reservas", "gestión", "deportes"],
-  authors: [{ name: "Padel Pro Team" }],
+  authors: [{ name: "SmashPoint Team" }],
 };
 
 export default function RootLayout({