Merge pull request #2 from andreaskelm/meta-system-update

feat: Meta-system update v3.4 -> v3.7

docs: Revise README to clarify PM Brain's purpose and functionality

feat: Simplified Product Judgment Test calculations in spreadsheets; enhance context health tracking for company documents; onboarding cluster

refactor: Update agent identity to PM Brain Coach, enhance README for clarity on PM challenges, and integrate guidelines for repo maintenance in MEMORY and ORCHESTRATION

refactor: Normalize terminology for organization and communication across documentation

feat: Add feedback section to weekly reflection template

feat: Stakeholder avatars and org survival frameworks

feat: Introduce segmentation framework and product-market fit assessment templates; enhance discovery documentation with new skills and structured templates for better customer insights

docs: Adding reference to checkpointing for long sessions

feat: Restructure documentation for clarity; move human-readable files to docs/ directory

fix: Checkpoint recommendation for entering execution_mode

feat: Platform-agnostic core, enhancing context management and session state persistence; context rot

feat: Update coaching persona and voice, communication style; disable logging hook for behavior tracking

feat: Enhance product sense coaching with new skills, improved evaluation processes, and added test generator for agent behavior