Code Brain v0.1.2

Public baseline for Code Brain.\n\nHighlights:\n- English-first README with Korean and multilingual docs.\n- Public GitHub upgrade flow: ai upgrade latest, /cb-upgrade, and raw-script bootstrap.\n- Compact MCP/default usage profile to reduce per-session token overhead.\n- Root AGENTS/CLAUDE contracts now match the user's language instead of forcing Korean.\n- Generated runtime memory and install manifests are excluded from public source tracking.\n\nInstall:\nbash\ncurl -fsSL https://raw.githubusercontent.com/ezBuilder/code-brain/main/scripts/upgrade-from-github.sh | bash -s -- /path/to/project\n