refactor: update application name and related metadata from SWOT Manager to Workshop Manager for consistency across the project

src/app/(auth)/register/page.tsx

@@ -4,6 +4,7 @@ import { useState } from 'react';
 import { signIn } from 'next-auth/react';
 import { useRouter } from 'next/navigation';
 import Link from 'next/link';
+import { RocketIcon } from '@/components/ui';
 
 export default function RegisterPage() {
   const router = useRouter();
@@ -73,8 +74,8 @@ export default function RegisterPage() {
       <div className="w-full max-w-md">
         <div className="mb-8 text-center">
           <Link href="/" className="inline-flex items-center gap-2">
-            <span className="text-3xl">📊</span>
-            <span className="text-2xl font-bold text-foreground">SWOT Manager</span>
+            <RocketIcon className="h-8 w-8 shrink-0 text-primary" />
+            <span className="text-2xl font-bold text-foreground">Workshop Manager</span>
           </Link>
           <p className="mt-2 text-muted">Créez votre compte</p>
         </div>