Phase 1: Curriculum learning framework — shared reward library, base env, task subclasses, YAML configs, unified train/eval#7

Copilot wants to merge 2 commits intomaincode-name-57/pilla_rl:mainfrom

copilot/add-curriculum-learning-frameworkcode-name-57/pilla_rl:copilot/add-curriculum-learning-frameworkCopy head branch name to clipboard