advanced prompting

Turn your Bash prompt into a fast, portable heads-up display with a drop-in ~/.bashrc: a clean two-line prompt that color-codes user@host (root/SSH alerts), trims the path, shows Python venv, and displays Git branch with change marks, plus exit codes and durations only when relevant. Includes distro install tips, reusable building-block patterns, and an optional switch to Starship for a managed solution.