Add section: install miniconda3

[icaoberg]

Add a new documentation section titled “Installing Miniconda3” to the appropriate chapter of the documentation. This section should provide users with clear instructions for installing Miniconda3 in their home directory on the cluster. The goal is to help users set up a lightweight Python environment manager without needing administrative privileges.

Requirements

• Introduce what Miniconda3 is and why it is recommended for HPC environments.
• Provide download instructions for the latest Miniconda3 installer (Linux/macOS).
• Include commands for running the installer and choosing an installation path in $HOME.
• Document how to initialize conda for bash/zsh (conda init).
• Add a verification step (e.g., conda info).
• Include HPC best practices:
  • Prefer Miniconda over full Anaconda due to storage limits.
  • Use separate environments per workflow.
  • Export environments for reproducibility.

Expected Deliverables

• A new Markdown file (e.g., install_miniconda.md) added under docs/.
• Section added to the chapter index and linked from the main index.md.
• Consistent style with the rest of the documentation (headings, code blocks, admonitions).

Additional Notes

Consider following up with a second section titled “Managing Conda Environments” for a deeper dive into conda usage.