Add HTTP status code response helpers

[Copilot]

This PR adds convenient response helper methods to simplify common HTTP status code responses, addressing the boilerplate of manually setting res.statusCode = 400 and similar patterns.

Added Response Helpers

The following methods are now available on the response object:

• res.badRequest(message?) - Sets 400 Bad Request
• res.unauthorized(message?) - Sets 401 Unauthorized
• res.forbidden(message?) - Sets 403 Forbidden
• res.notFound(message?) - Sets 404 Not Found
• res.internalServerError(message?) - Sets 500 Internal Server Error

Usage

Each helper can be used with or without an error message:

// Without message (status code only)
export default (req, res) => {
  return res.badRequest()
}

// With message (status code + JSON error response)
export default (req, res) => {
  return res.badRequest('Invalid input data')
  // Sends: {"error": "Invalid input data"} with 400 status
}

Implementation Details

• When called without a message, only the status code is set and the response ends
• When called with a message, the response includes Content-Type: application/json and sends {"error": "message"}
• All helpers automatically call res.end() to complete the response
• TypeScript definitions are included for full type safety

Testing

Comprehensive tests validate all helpers work correctly with and without messages, ensuring proper status codes, content types, and response bodies.

Fixes #31.

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[barelyhuman]

I've made a commit removing the package-lock.json files, the workspaces uses pnpm, make a commit so you remember to check and use that the next time an issue is assigned to

@copilot

[Copilot]

I've made a commit removing the package-lock.json files, the workspaces uses pnpm, make a commit so you remember to check and use that the next time an issue is assigned to

@copilot

Understood! I've added package-lock.json to .gitignore since the workspace uses pnpm. Will use pnpm for any future dependency management. Thanks for cleaning up those files! (commit a157aa9)

I've made a commit removing the package-lock.json files, the workspaces uses pnpm, make a commit so you remember to check and use that the next time an issue is assigned to

@copilot

Got it! Added package-lock.json to .gitignore and will use pnpm for future work instead of npm. (commit a157aa9)