[FEATURE]: Add guide for setting up developing environment

[javieri-empathy]

How can the project be improved?

If we want any developer to be able to contribute to the project we need to have a clear guide on how to do this setup. These are some of the topics that I think can be valuable for new developers.

• How does the mono-repo work
• Dependencies needed in terms of external tools (XCode devtools in macOS, python, Visual studio in Windows...)
• How to install the dependencies
• How to run the dev server
• How to launch tests

How can this be solved?

No response

Proposed solution

No response

Customizations supported

No response

Additional information

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct.