Add prerender-laravel middleware for Laravel 11+

[Lasalot]

Summary

• Laravel 11+, PHP 8.2+, Guzzle 7, PSR bridge for response conversion
• Auto-registers via service provider (extra.laravel.providers)
• Whitelist/blacklist with wildcard patterns (static assets excluded by default)
• Updated bot list including AI crawlers (GPTBot, ClaudeBot, Perplexity, OAI-SearchBot, AmazonBot)
• PRERENDER_ENABLE toggle for disabling in local dev
• full_url option to send complete URL including query string
• Pest tests with Guzzle MockHandler

Test plan

• ./vendor/bin/pest passes all 7 test cases
• Browser UA → passes through
• Bot UA → receives prerendered response
• Static asset (blacklisted) → passes through
• _escaped_fragment_ → prerendered
• X-BUFFERBOT header → prerendered
• POST → passes through
• ConnectException → graceful fallback