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/next.config.js

@@ -1,7 +1,7 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   output: "standalone",
-  transpilePackages: ["@padel-pro/shared"],
+  transpilePackages: ["@smashpoint/shared"],
   images: {
     remotePatterns: [
       { protocol: "https", hostname: "res.cloudinary.com" },