Try auth0-react instead of oidc-react

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https://github.com/auth0/auth0-react

This is not about going back to auth0. @gustavlrsn has been using nextjs-auth0 in dreams and it seems to work as a generic oidc client lol. Because of that I'm guessing auth0-react probably also works pretty well for generic oidc.

oidc-react itself is pretty ok but the underlying oidc-client-js has given us a bunch of problems (several of which we've tbf worked around by now) and bugs. So could be nice to try a hopefully better maintained alternative.