Fix: cforge-dev init generates empty CFORGE_DEV.md instead of extracting context

[ermin-muratovic]

Problem

cforge-dev init discovers 30+ context files but generates a near-empty CFORGE_DEV.md with only owner/repo. The manually written file contained: architecture reference, language constraints, key rules, current milestone, ADR location.

Expected

init should extract key information from discovered files and generate a meaningful CFORGE_DEV.md. Minimum content:

• Project name and purpose (from README.md)
• Language and stack (from ARCHITECTURE.md or package.json)
• Key constraints (from ARCHITECTURE.md decision log)
• Current milestone (from MILESTONES.md)
• ADR/scenario locations (from discovered docs/)

Reference

Diff between generated and manually written CFORGE_DEV.md shows exactly what is missing.