Add E2E tests for Usage API.

[rahulsprajapati]

Description of the Change

E2E Tests for PR #1060

TODO Tests:

• "Usage Tracking" Feature UI exists and verify admin user role is selected by default.
• Verify "AI Usage Tracking" settings exists within "Usage Tracking" nav menu.
• Can save "AI Usage Tracking" settings
• Verify we can see Dashboard Widget in default stats.
• Run cron job and verify usage data updated from mock data.
• Verify widget data shows correct data, from mock data.
• Verify force refresh button works.
• Enable soft/hard limit and confirm notice.
• Verify tts feature can't be used when hard limit reached.

TODO Docs:

• Update documentation for usage tracking in wp-hooks-docs

Closes #

How to test the Change

Changelog Entry

Added - Add E2E test cases for Usage Tracking Feature

Credits

Props @rahulsprajapati , ...

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.

[github-actions]

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✅ Status: Passed

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