🧪 test(cypress): add dev-only routes & commands for testing

[devonzara]

Closes N/A

Description

This PR adds some developer-only routes and utilities to aid with writing Cypress tests.

Routes Added:

• GET /api/dev/login/:id? If no id is provided, a new user is created and logged in.
• POST /api/dev/run-util Expects a body of { method: string; args: unknown[] }.

Cypres Commands Added (aliases for the routes above):

• createUsers(count?: number)
• login(id?: number)
• truncateDatabase()
• runUtil(method: string, ...args: unknown[]) This method can run any of the exported /server/test/utils functions. It accepts the method's name as the first parameter and the arguments to pass into the function as subsequent parameters.

Extras:

• /cypress/e2e/dev.spec.ts was added to demonstrate the use of the newly added commands & endpoint.

Testing

Run automated tests, both Jest and Cypress.

Type of change

Please remove all except for everything applicable, and then remove this line.

• Other (test utilities)

Screenshots

N/A

Checklist:

• [X] Changes have new/updated automated tests, if applicable
• [X] Changes have new/updated docs, if applicable
• [X] I have performed a self-review of my own code
• [X] I have added comments on any new, hard-to-understand code
• [X] Changes have been manually tested
• [X] Changes generate no new errors or warnings

[devonzara]

@timmyichen Added a dynamic endpoint, as requested, and removed the other static endpoints. Please re-review.