break out auth and user requirements

[ericelliott]

Adding basic requirements for auth. Please make sure all the requirements make sense - I did not read them carefully.

[Copilot]

Pull Request Overview

This PR introduces authentication requirements documentation and minor configuration updates. The main purpose is to establish clear specifications for a passwordless authentication system that prioritizes passkey authentication with magic link fallback.

• Added comprehensive requirements for user authentication state management including magic link, passkey, and session handling
• Defined authentication flow requirements for sign-up and sign-in processes
• Updated test configuration to run once instead of in watch mode

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
src/features/authenticate/user-reducer-requirements.md	Detailed state management requirements for authentication flows
src/features/authenticate/authenticate-requirements.md	High-level authentication flow requirements for passwordless system
package.json	Modified test script to run tests once instead of watching
.swcrc	Added SWC configuration file for JavaScript/TypeScript compilation

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[janhesters]

I think we can close #34 and keep yours - it's going to be better.