[Users] Add Get All Users Route (GET /users)

[nourshoreibah]

User Story

As a user I want to retrieve all users from the Users table.

Description

• Add the GET /users route to the existing users Lambda using:
  node tools/lambda-cli.js add-route users GET /users
• Use Kysely to query all users, optionally supporting pagination via ?page and ?limit.
• Test using Swagger UI and Jest.

Acceptance Criteria

• Route returns all users from the local database.
• Swagger returns 200 with an array of user objects.
• Jest tests confirm correct pagination and empty state behavior.