Update to use central lib for auth

[jmgasper]

From #344

Can we use our central lib for auth (instead of https://github.com/topcoder-platform/topcoder-x-ui/tree/develop/src/front/src/app/auth). Example- https://github.com/appirio-tech/connect-app/blob/test/auth0lib/package.json#L153 appirio-tech/connect-app#4082

For the challenge

The expectation is that the new RS256 auth flow will work as expected, while still being able to handle HS256 tokens in the cookies for authorization (if the user logged in on an old app that hasn't been updated yet).

For testing:

1. Login to TC-X and see the new login form. App should work as normal
2. After logging in to TC-X, try to navigate to another app and ensure you stay logged in
3. Logout and into an updated app, like topcoder-dev.com or vanilla.topcoder-dev.com and get an RS256 token
4. Ensure you can come back to Topcoder X and the cookie is processed and you are logged in
5. Logout and login and get an old token (https://accounts.topcoder-dev.com/member?retUrl=https:%2F%2Fx.topcoder-dev.com%2F
6. Ensure you can still navigate Topcoder X and the old token is processed and you are logged in

[jmgasper]

Contest https://www.topcoder.com/challenges/30144600 has been created for this ticket.

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[jmgasper]

Contest https://www.topcoder.com/challenges/30144600 has been updated - it has been assigned to afrisalyp.

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