setup auto test structure and add tests for onboarding

[lee-sqa]

🔘 PR Type

What kind of change does this PR introduce?

• Bugfix
• Enhancement
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no API changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe: Playwright E2E test for web extension.

📜 Background

This PR is to setup automation testing with Playwright with test scripts to test these onboarding features:

• create and back up new wallet.
• restore wallet with seed phrase.

Main test structure in the autotests folder

• fixtures: base file to initiate extension connection and data file to store test data.
• pages: POM approach to store page locators and custom functions according to each page module.
• test: spec files to run actual tests.

Installing and running test

1. Go to the autotests folder or cd autotests.
2. Run npm install to install dependencies.
3. Run npx playwright install to install browsers.
4. Run npm test to run all the tests.
5. Run npm test:report to generate test report.

[github-actions]

Test with build here: https://github.com/secretkeylabs/xverse-web-extension/actions/runs/7536285543