v0.2.1

Full Changelog: v0.2.0...v0.2.1

Changed

• Added Sphinx documentation site with API references, guides, CLI reference generation, and concepts sections
• Changed storage layout migration to use Ledgercore schema-3 with journaling, recovery, and UUID adoption
• Changed CLI to propagate workspace root through all commands and added structured JSON output with help text
• Added tests for documentation structure, CLI reference generation, migration safety, and storage layout migration

Fixed

• Fixed storage format handling in v2 migration and result path resolution
• Added missing dependency and fixed pre-commit configuration