Create test-utils for connector

[LuizAsFight]

Objective

Avoid having the overhead of setting up a browser with extension and complex setup for running valid e2e tests integrated with connectors

Aims to create a tool similar to @fuels/playwright-utils, but focusing on expose a test-util for the connector package

• It should use a mocked connector, just to be a helper avoiding any failing to don't block the user testing
• the connector can be the BurnerWallet
• after completing this test-utils, we can deprecate @fuels/playwright-utils and stop maintaining it