[Doc] [Improvement] prepare a more beginner-friendly developer documentation for the C++ library

### Describe the enhancement requested

prepare a more beginner-friendly developer documentation for the C++ library

For the time being it will be prepared to include the following sections

- [ ] Explain some basic concepts for beginner developers
- [ ] An introduction to good first issue
- [ ] Specific open source development process
- [ ] A detailed example of using dev container

### Component(s)

Documentation

Start by locating the existing developer documentation for the C++ library and any current dev-container guidance. Define the four requested sections from the issue, then check with maintainers where they belong and what project-specific examples are accurate. Done means the beginner concepts, good-first-issue introduction, open-source process, and detailed dev-container example are documented.

Written by the indexing model from the issue text.