Home page is now a Livewire-powered, searchable/paginated Site list
(search by domain) instead of the stock Laravel welcome page. Clicking
a site goes to a plain controller-rendered detail page listing its
pages. Shared layout at resources/views/components/layouts/app.blade.php.
Adds Site/SitePage models and the crawlindex:fetch command, which pulls
CDX index records from Common Crawl and optionally enriches them with
page title/description/keywords/body text extracted from the WARC
archive. CDX/WARC access and the site/page upsert logic live in
CommonCrawlIndexService and WarcRecordFetcher.
m105