Add development and contribution guides in the README or repo wiki

[mxmaher]

It would be very helpful if the project has some kind of contribution and development guides in the README.
It should explicitly mention that the project uses poetry and that there's a devcontainers setup already existing, this would save some time and confusion for anyone who wish to contribute to this awesome project.
Also it would be great to mention that to test the UI there's an example project existing under the tests folder

For example:

## Development Guide
This project uses poetry for managing dependinces, local development envirnoment and packge build and release.
A devcontainers setup is also provided for a more quick and convenient local setup if you are used to it or wish to try it.

**Use the following commands to setup the project locally for the first time**

1. Install poetry if not already available on your system [install poetry](https://python-poetry.org/docs/#installation)
2. etc...
3. ........

[lukasvinclav]

All of these is already in the documentation :-)

[mxmaher]

@lukasvinclav Thank you for pointing this out, I'll check it.

I think having a link to this section of the docs in the readme would be helpful and make it more accessible.