refactor: reorganize scripts - move debug code to experiments/

- Move debug/test scripts from src/scripts/ to experiments/
- Remove test-detail-endpoint from package.json
- Delete temp-product-page.html
- Move E2E_GUIDE.md to docs/
- Add experiments/README.md with documentation
- Keep only production scripts in src/scripts/
- Clean up tsconfig.json exclude list (experiments are now outside src/)

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

package.json

@@ -10,7 +10,6 @@
     "dev": "tsx src/scripts/scrape-magnit-products.ts",
     "enrich": "tsx src/scripts/enrich-product-details.ts",
     "test-db": "tsx src/scripts/test-db-connection.ts",
-    "test-detail-endpoint": "tsx src/scripts/test-all-detail-endpoints.ts",
     "prisma:generate": "prisma generate",
     "prisma:migrate": "prisma migrate dev",
     "prisma:studio": "prisma studio --config=prisma.config.ts",