test: convert recognizer tests to use Node instead of Playwright

[radium-v]

Pull Request

📖 Description

Convert the fast-router recognizer tests from Playwright to Node.js built-in test runner (node:test) and assertion module (node:assert/strict). The recognizer tests are pure logic tests with no browser dependencies, so they don't need Playwright.

📑 Test Plan

All 10,917 recognizer tests pass with npm run test:

# tests 10917
# suites 9
# pass 10917
# fail 0

✅ Checklist

General

• I have included a change request file using $ npm run change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.