Playwright test integration

[lifeart]

Let's assume we would like to run tests without "ember" magic, just have same exp as our application users.

For this purpose, we have to add proper playwright setup:

• [x] Create playwright config
• [x] Add sample e2e tests
• [x] Verify it's working on ci
• [x] Process coverage information from tests https://github.com/lifeart/demo-ember-vite/pull/50
• [x] Add code coverage reporter on ci https://github.com/lifeart/demo-ember-vite/pull/45
• [x] Capture test coverage from playwright https://github.com/lifeart/demo-ember-vite/commit/27fce1def89dc7b8bbb2de25d0e204317e286651

[lifeart]

It's working now.