[Feature]: Write a better contribution guide

### 🚀 Feature Proposal

Write a better contribution guide with more details on how to fork, clone, run and write implementations and tests in the application.

### Motivation

Our contribution guide is very poor. A better one should be implemented for all kind of developers.

### Example

_No response_

Start by locating the existing contribution guide and reviewing its current instructions for forking, cloning, running the application, and writing implementations and tests. Done means the guide clearly covers those steps for developers and is understandable without additional context.

Written by the indexing model from the issue text.