[DOC] - Add notes on how to run Playwright/Cypress tests locally

[viniciusdc]

Preliminary Checks

• [X] This issue is not a question, feature request, RFC, or anything other than a bug report. Please post those things in GitHub Discussions: https://github.com/nebari-dev/nebari/discussions

Summary

We should provide clear instructions on executing Cypress and Playwright test workflows using Makefiles. This transition to Makefiles for running tests will simplify the process for users who wish to test our infrastructure and developers looking to replicate the CI pipelines. Including detailed guidance on these workflows will ensure a smooth adaptation for all stakeholders.

Steps to Resolve this Issue

1. Test/Run the Cypress and Playwright tests locally;
2. Create these steps into a Makefile;
3. Document a note for first-time contributors on how to run such file and run the tests

[marcelovilla]

Just as a side note, we should probably update https://www.nebari.dev/docs/community/nebari-tests once we have a way of running the tests using a Makefile.