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/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@padel-pro/web",
+  "name": "@smashpoint/web",
   "version": "0.1.0",
   "private": true,
   "scripts": {
@@ -14,7 +14,7 @@
     "db:seed": "tsx prisma/seed.ts"
   },
   "dependencies": {
-    "@padel-pro/shared": "*",
+    "@smashpoint/shared": "*",
     "@prisma/client": "^5.10.0",
     "@radix-ui/react-dialog": "^1.0.5",
     "@radix-ui/react-dropdown-menu": "^2.0.6",