Release v0.3.0: CSV output, wishlist commands, improved error handling

- Replace stdout output with structured CSV file generation
- Add wishlist, all commands with --min-count and --max-wishlist flags
- Introduce CarCounts struct for shared analysis computation
- Improve error handling: return Result instead of unwrap/panic
- Add prize field to BestCarRecord
- Remove TODO.md

CHANGELOG.md

@@ -7,6 +7,31 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.0] - 2026-05-07
+
+### Added
+- New `all` command that generates all output CSV files in a single parse pass
+- New `wishlist` command with `--min-count` and `--max-wishlist` flags for wishlist management
+- `--min-count` flag on `best` command to configure very_best threshold (default: 10)
+- `--max-wishlist` flag on `wishlist` and `all` commands (default: 300)
+- `CarCounts` struct and `compute_car_counts()` function for shared analysis computation
+- CSV file output: `best.csv`, `very_best.csv`, `wishlist.csv`, `add.csv`, `remove.csv`
+- All output files now include CSV headers
+
+### Changed
+- `best` command now writes to `best.csv` and `very_best.csv` instead of printing to stdout
+- `trash` command now writes to `trash.csv` instead of printing to stdout
+- All output files are sorted by car RQ (via `compare_cars()`)
+- `wishlist` command now generates ideal wishlist, add/remove recommendations
+
+### Removed
+- `missing` command (functionality absorbed into `wishlist`/`add`/`remove`)
+- `+` prefix from output (no longer needed with dedicated wishlist commands)
+- `-` prefix from output (replaced by dedicated `remove.csv`)
+- `print_best_cars()`, `print_wishlist_stale()`, `print_trash()` functions
+
+## [0.2.0] - 2026-05-07
+
 ### Added
 - Comprehensive documentation suite in `docs/` directory
 - Detailed code comments for all public functions