* Add bd doctor command for installation health checks
Implements a comprehensive health check command similar to claude doctor
that validates beads installation and provides actionable recommendations.
Features:
- Installation check (.beads/ directory exists)
- Database version verification (compares with CLI version)
- ID format detection (hash-based vs sequential)
- CLI version check (fetches latest from GitHub)
- Storage type detection (SQLite vs JSONL-only mode)
- Tree-style output with color-coded warnings
- JSON output for scripting (--json flag)
- Actionable fix recommendations for each issue
Implementation improvements:
- Status constants instead of magic strings
- Semantic version comparison (fixes 0.10.0 vs 0.9.9 edge case)
- Documented defer pattern for intentional error ignore
- Comprehensive test coverage including version comparison edge cases
- Clean integration using slices.Contains for command list
Usage:
bd doctor # Check current directory
bd doctor /path/to/repo # Check specific repository
bd doctor --json # Machine-readable output
* Simplify bd doctor documentation in README
Reduce verbose health check section to 2 lines as requested.
* Fix bd doctor to handle JSONL-only mode for ID format check
When no SQLite database exists (JSONL-only mode), skip the ID format
check instead of showing an error. This prevents the confusing
'Unable to query issues' error when the installation is actually fine.
