Update mission statement to reflect AI-driven guidance for self-taught programmers

[pandasanjay]

AI is making programming accessible to everyone, but building reliable, scalable software still requires the right skills. I guide self-taught programmers in leveraging AI tools to deliver production-quality solutions.

This issue is to update the mission statement in relevant places throughout the portfolio to reflect this new focus. Please ensure the new statement is visible on the homepage and any about or mission-related sections.

[pandasanjay]

@copilot I have updated my base branch, could you please create a new PR for this and close the old one.