Expose type definitions for `IUser` to be consumed

[mcmxcdev]

We want to implement an API request to fetch a single user: https://docs.frontegg.com/reference/userscontrollerv1_getuserbyid in our project and want to strictly type the expected API response.

I assumed that I would be able to import IUser and use it, but it doesn't seem like it is exported from @frontegg/client

[mcmxcdev]

There’s also more type definitions that we need, e.g. for the get tenants request and others

[amitsharonzorro]

Any updates on this?