chore(angular-react): Migrate UsersServices to React useUsers hook

[devin-ai-integration]

Summary

Migrates the Angular UsersServices to a React custom hook (useUsers) following the Angular to React migration playbook. The new hook provides equivalent functionality to the Angular service's getUsers() method.

Changes:

• Added useUsers.ts with a React custom hook that fetches users from JSONPlaceholder API
• Replaces HttpClient + Observable pattern with native fetch + React state management
• Provides loading, error, users states and a refetch function
• Also exports a standalone getUsers() async function for non-component contexts
• Includes full TypeScript types for the User interface

Angular service preserved - the original UsersServices.ts was not removed per playbook guidelines.

Review & Testing Checklist for Human

• Verify the User interface matches the actual JSONPlaceholder API response - the type was manually defined and should be validated against https://jsonplaceholder.typicode.com/users
• Confirm migration approach is acceptable - this adds React code to an Angular project; React is not currently a dependency, so the file won't compile until React is added
• Test the hook in a React environment - copy the hook to a React project and verify it fetches users correctly, handles errors, and the refetch function works
• Consider adding unit tests - no test file was created for the new hook (the original Angular service had a spec file)

Notes

This migration follows the Angular to React playbook. The React hook cannot be tested in the current Angular-only environment since React is not installed as a dependency.

Link to Devin run: https://app.devin.ai/sessions/1332f66f33e047ed90e7825500a62628
Requested by: @milind-cognition

[devin-ai-integration]

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