feat(cli): add AI tool detector for installed coding assistants

[JeremyDev87]

Summary

• Add detectTools(cwd) function in packages/rules/lib/init/detect-tools.js
• Scans for 6 AI coding tools: Cursor, Claude Code, Codex, Antigravity, Amazon Q, Kiro
• Reports existence, config files found, rules presence, and indicator for each tool
• Supports alternative config paths (e.g., .cursorrules for Cursor)
• Importable CommonJS module for CLI integration in feat(cli): codingbuddy init --team CLI command #1451

Test plan

• 12 unit tests passing (node --test packages/rules/__tests__/init/detect-tools.test.js)
• Tests cover: empty directory, each tool individually, multiple tools, .cursorrules alt path, hasRules detection, config file listing, return structure validation
• All CI checks passing: lint, format, typecheck, test:coverage, circular, build
• Rules validation passing: agent schema + markdownlint
• Security audit clean for all workspaces

Closes #1449

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Project	Deployment	Actions	Updated (UTC)
codingbuddy-landing	Ready	Preview, Comment	Apr 10, 2026 2:07am

[JeremyDev87]

Superseded by #1459 which integrates all Wave 3 sub-issues (#1449, #1450, #1451) into a single PR.