Add templates, tests, and miscellaneous project files

Includes new page templates (fitness-gym, nonprofit, online-course,
photography-studio, real-estate, startup-company, travel-blog,
wedding-invitation) with thumbnail SVGs, test specs, documentation
files, and minor updates to index.html, router.php, and playwright config.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

playwright.config.js

@@ -5,14 +5,14 @@ module.exports = defineConfig({
   timeout: 90000,
   retries: 0,
   use: {
-    baseURL: 'http://localhost:8081',
+    baseURL: 'http://localhost:80',
     headless: true,
     viewport: { width: 1280, height: 900 },
     screenshot: 'only-on-failure',
   },
   webServer: {
-    command: 'php -d upload_max_filesize=500M -d post_max_size=512M -d memory_limit=768M -S localhost:8081 router.php',
-    port: 8081,
+    command: 'php -d upload_max_filesize=500M -d post_max_size=512M -d memory_limit=768M -S localhost:80 router.php',
+    url: 'http://localhost:80',
     reuseExistingServer: true,
   },
   projects: [