Add Microsoft AI open source portal with resource discovery#175

Open

richardogundele wants to merge 3 commits intomicrosoft:masterfrom

richardogundele:claude/setup-contribution-SapOH

Commits on Sep 15, 2025

added ML-For-Beginners and contribution_plan.md and contribution_tracker.md
richardogundele
committed

Commits on Dec 29, 2025

Commit from Dualite Alpha:
richardogundele
committed

Commits on Mar 6, 2026

feat: add missing resources, section nav, and enhanced footer
claude
committed