feat: add playwright testing

[a2937]

Checklist:

• I have read freeCodeCamp's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.md)

Closes #XXXXX

Adds Playwright testing to our repository. It's a fairly simplistic test for now.

[a2937]

Here's the page for how to set up the workflow. This might be useful to help get the ideal configuration. https://playwright.dev/docs/ci-intro

[a2937]

I'm going to need a little help here. It seems like the web server isn't starting up in the CI but it is locally and I'm not sure what the problem is.

[naomi-lgbt]

Looks like you got it working?

[a2937]

So I did. I wasn't actually sure if it would work.

[socket-security]

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[raisedadead]

Can we add some progress, and the interactive mode similar to the main repository. When I run the command locally, it doesn't "appear" to do anything.

[raisedadead]

If you need more help please drop the @freeCodeCamp/dev-team a message. Someone should be able to guide you more in the chat.

[raisedadead]

[raisedadead]

Thanks for the updates @a2937 !

@Sembauke Can you give this a look since you have expertise in E2E testing? This PR essentially aims to be a "setup" PR to have Playwright similar to the fCC repo. Do you think anything should be improved?

Thanks.