Document pagination URL patterns

[samdark]

Summary

• add routing guide examples for query-string pagination and path-segment pagination
• show preserving current filters while replacing only the page query parameter
• note that duplicate URL shapes for the same list need a canonical choice

Verification

• Used a fresh yiisoft/app template created with composer create-project yiisoft/app /tmp/yii-docs-upload-app --no-interaction
• Added verify-pagination-url-patterns.php to exercise Yii Router route generation
• Ran php -l verify-pagination-url-patterns.php
• Ran php verify-pagination-url-patterns.php; verified generated URLs:
  • /articles?page=2&tag=yii
  • /articles/page/2?tag=yii
  • /articles?tag=yii&sort=created_at&page=3
• Ran vendor/bin/phpstan analyse verify-pagination-url-patterns.php --level=max --no-progress
• Ran vendor/bin/psalm --no-cache --output-format=console verify-pagination-url-patterns.php
• Ran npx markdown-link-check src/guide/runtime/routing.md
• Ran npm run build

[Copilot]

Pull request overview

This PR adds guidance to the routing guide for generating pagination URLs in Yii applications, covering both query-string and path-segment patterns.

Changes:

• Adds examples for query-string pagination URLs with filters.
• Shows how to preserve existing query parameters while replacing page.
• Documents path-based pagination URLs and canonical URL considerations.