Description

This PR introduces a base infrastructure with Playwright to run tests on pretty much every examples on the examples/ folder. I noticed that not everything can be tested right away because they need different setups, and some of them depend on external services (ie, word-addin for example). Same for the node example, which we wouldn't be able to use playwright.

In short, I'm testing pretty much all examples that share the same setup and that are working properly.

Examples that were ignored here for now

1. agentic-slack-redlining-example -> require its own testing
2. chrome-extension -> require its own testing
3. docxtemplater-example -> screenshot not being taken reliably
4. grading-papers-example -> doesn't actually test SD directly unless we write a specific test because the SD is not rendered on the main page
5. nodejs-example -> requires its own testing
6. vue-custom-node-example -> something fails when we try to open it
7. vue-html-editor -> needs a different setup