[DOC] Documentation of the study's directory

:octocat: **Documentation request**

**Describe your documentation request clearly bellow**

Document the [study's directory](https://github.com/Dirack/diffractionSimulator/tree/study/0.1/study) experiments with a README file.

**Program version**

None.

**What kind of documentation you are requesting?**

- [x] README files.
- [ ] Wiki pages.
- [ ] Jupyter notebooks.
- [ ] Other
