[Projects] Add Get All Projects Route (GET /projects)

[nourshoreibah]

User Story

As a user I want to retrieve all projects so that I can view and select which one to manage.

Description

• Add the GET route to the existing projects Lambda using lambda-cli.
  Command:
  node tools/lambda-cli.js add-route projects GET /projects
• Use Kysely to select all records from the projects table.
• Return list of projects with projectID, name, and total_budget.

Acceptance Criteria

• Returns 200 and JSON array of projects.
• Returns empty array if no projects exist.