feat(auth0-fastify): use AsyncLocalStorage to track FastifyRequest and FastifyReply

[frederikprijck]

Description

This PR moves request and reply instances to Async Local Storage by using the onRequest hook. Because of this, we have global access to the request and reply instances, and we have no need to pass the request and reply instances to every single public method.

Before:

fastify.get('/', async (request, reply) => {
  const user = await fastify.auth0Client!.getUser({ request, reply });

  return reply.viewAsync('index.ejs', { isLoggedIn: !!user, user: user });
});

After:

fastify.get('/', async (request, reply) => {
  const user = await fastify.auth0Client!.getUser();

  return reply.viewAsync('index.ejs', { isLoggedIn: !!user, user: user });
});

We remain to accept both approaches, but we have marked the one where you pass request and reply as deprecated.

References

N/A

Testing

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not the default branch