fix: recreate Auth0Client when configuration props change

[gyaneshgouraw-okta]

Summary

This PR improves how the Auth0Client is created in the Auth0Provider component. It replaces useState with useMemo to ensure the client is properly recreated when key props (domain, clientId, audience, scope, etc.) change. This makes the component behavior more predictable and correct when props are updated.

Fixes: #830

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Changes

• Refactored Auth0Provider to use useMemo for Auth0Client instantiation.
• Removed unused useState import from src/auth0-provider.tsx.

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Tests

• Added a test suite in __tests__/auth-provider.test.tsx to verify that the Auth0Client is correctly recreated when clientId, audience, or scope props change.

[gyaneshgouraw-okta]

After thorough review, we've decided not to proceed with the fix as it would create multiple Auth0Client instances.

Prevent authentication state corruption
Avoid security vulnerabilities from dynamic reconfiguration
Ensure predictable token caching behavior
Maintain session consistency