Ensure python3.12 is installed

- name: Install build tools and Python 3.12
 run: |
 sudo apt-get update
 sudo apt-get install -y build-essential software-properties-common
 sudo add-apt-repository -y ppa:deadsnakes/ppa
 sudo apt-get update
 sudo apt-get install -y python3.12 python3.12-venv python3.12-dev

• build-essential: compilers and libraries for building C/C++ code
• software-properties-common: needed to add PPAs like deadsnakes.
• ppa:deadsnakes/ppa: provides newer Python versions for Ubuntu.
• python3.12, python3.12-venv, python3.12-dev: installs Python 3.12 interpreter, virtual environment module, and development headers.