chore: export mocks

[shuowu-okta]

Description:

Only exports mocks from package.json, no lib code change

PR Checklist

• Have you verified the basic functionality for this change?
• Did you add tests, as appropriate, following our Automated Test guidelines?
• Did you follow our Security Best Practices?
• Did you verify the change by running downstream monolith artifact? (Provide link to build below)
• Does this PR include noticeable changes to the UI? (If yes, attach screenshots/video below)

Issue:

• OKTA-719095

Reviewers:

Screenshot/Video:

Downstream Monolith Build:

[lesterchoi-okta]

Thoughts on exposing the mocks themselves, i.e., JSON files?

[shuowu-okta]

Thoughts on exposing the mocks themselves, i.e., JSON files?

It's actually easier this way to integrate as a dev server (webpack, vite) middleware, instead of writing another one. mocks (json) are still accessible from @okta/okta-signin-widget/mocks/${path-to-file}