Docs: add short “Reproducibility tips” box to a beginner tutorial

[MTR-Tushar]

Feature Request

Hi pyGIMLi team,

I’d like to contribute a tiny docs improvement for new users:

• Add a 4–5 line “Reproducibility tips” box near the top of a beginner tutorial (e.g., GIMLi basics).
• Tips: pin the conda environment; set random seeds for synthetic examples; note OS differences if any; link to installation & contributing pages.

Rationale: lowers onboarding friction and aligns with collaborative/reproducible workflows. Happy to open a small PR if you point me to the preferred page/file.

Thanks! — M. T. R. Tushar