Generate fake mock data

A neat feature would be to use the mock feature with a tool like [fakerjs](https://fakerjs.dev/api/) and essentially be able to mock a full API, and generate random data.

For instance when building a user management tool it would be nice to be able to generate 100's of random users mocking the graph endpoints to test things like pagination without having to create those users in my dev tenant

Start by reading the repository's existing mock feature and the linked fakerjs API documentation to understand how generated data could fit into API mocking. Define the supported API shapes, configuration, generation behavior, and pagination expectations before implementation; done means a full API can return randomized collections for scenarios such as hundreds of users.

Written by the indexing model from the issue text.