Add pyenv and pyenv-virtualenv to the development setup

[zorexsalvo]

Add Installation Steps

Include instructions for installing pyenv and pyenv-virtualenv on common platforms (e.g., macOS, Ubuntu, Windows via WSL).

Configuration Instructions

Provide guidance on configuring pyenv and pyenv-virtualenv with shell initialization (e.g., .bashrc, .zshrc, .bash_profile) to enable automatic Python version and environment selection in different directories.

Usage Examples

Add examples on:

• Creating a specific Python version environment using pyenv
• Setting up and activating a virtual environment using pyenv-virtualenv
• Linking project requirements to the environment for easier dependency management