Integrate Playwright tests

[rak3rman]

Description

Create a testing harness for the frontend (and subsequntly the backend) using Playwright. This will provide end-to-end testing of both the frontend and backend. Additional work will be required in the Github Actions workflow to ensure that the backend is stood up and running.

• Install Playwright
• Add a new step to the "next_integration" workflow that runs Playwright tests after compilation checks, should halt and wait to make sure the "hono_integration" workflow passes
• Create a sample test against an existing page, create one if it doesn't exist already

Acceptance Criteria

Generated by Zenhub AI

• Scenario: Integrate Playwright tests
• Given Playwright is installed
• When a new step is added to the "next_integration" workflow to run Playwright tests after compilation checks
• Then the workflow should halt and wait for the "hono_integration" workflow to pass
• And a sample test is created against an existing page, creating one if it doesn't exist already