Extend console-warnings E2E fixture to catch other warning categories

[pedropaulovc]

Context

As part of Issue #186, we created a Playwright fixture (e2e/fixtures/console-warnings.ts) that fails tests on unexpected degraded mode warnings. This pattern could be extended to catch other types of warnings.

Proposed Enhancement

Extend the console-warnings fixture to:

1. Allow tests to declare which warning categories they expect
2. Fail on ANY unexpected console warnings (not just degraded mode)
3. Support multiple warning categories with different opt-in flags

Example API

test.use({ 
  expectDegradedMode: true,
  expectDeprecationWarnings: true,
  allowAllWarnings: false  // strict mode
});

Benefits

• Catch unexpected warnings earlier in development
• More comprehensive test coverage
• Better signal-to-noise ratio in console output

Implementation Notes

• Maintain backward compatibility with existing expectDegradedMode flag
• Consider performance impact of listening to all console messages
• Document when to use strict mode vs. lenient mode