Add comprehensive CLI commands to mirror Krónan Public API

[arnif]

Summary

This PR adds comprehensive CLI commands to fully mirror the Krónan Public API, building on the previous API migration.

New Commands Added

📁 Categories

Browse products by category hierarchy:

kronan categories                    # List all categories
kronan category <slug> [--page N]    # Browse products by category

📝 Order Modifications

Modify active orders before they're fulfilled:

kronan order delete-lines <token> <lineId1> [lineId2...]
kronan order lower-quantity <token> <lineIds...> --quantity N
kronan order toggle-substitution <token> <lineIds...>

📋 Product Lists (Full CRUD)

Manage saved product collections:

kronan lists create <name> [--description "..."]
kronan lists view <token>
kronan lists delete <token> [--force]
kronan lists add <list-token> <sku> [qty]
kronan lists remove <list-token> <sku>
kronan lists clear <token> [--force]

✅ Shopping Notes (Skundalisti)

Manage freeform shopping lists for Scan and Go:

kronan notes                                    # View shopping note
kronan notes add [--text "..."] [--sku SKU] [--quantity N]
kronan notes update <line-token> [--text "..."] [--quantity N]
kronan notes remove <line-token>
kronan notes toggle <line-token>               # Mark complete/incomplete
kronan notes clear [--force]
kronan notes archived                          # View completed items

📊 Purchase Statistics

View purchase history and frequency data:

kronan stats [--limit N] [--offset N] [--include-ignored]
kronan stats ignore <id>
kronan stats unignore <id>

New Files

• src/commands/categories.ts - Category browsing
• src/commands/orders-modify.ts - Order modifications
• src/commands/product-lists.ts - Full product list CRUD
• src/commands/shopping-notes.ts - Shopping notes management
• src/commands/purchase-stats.ts - Purchase statistics

Bug Fixes

• Fixed getMe() to handle both object and array responses from API
• Fixed getShoppingNote() to handle both object and array responses
• Fixed stats command to properly handle flags when no subcommand given

API Coverage

Feature	Status
✅ Me	View identity
✅ Products	Search, details
✅ Categories	List, browse by category
✅ Orders	List, details, delete lines, lower quantity, toggle substitution
✅ Checkout	View, add lines, clear
✅ Product Lists	Full CRUD + item management
✅ Shopping Notes	Full CRUD + archived items
✅ Purchase Stats	View, ignore/unignore

Testing

All commands tested and working:

• ✅ Lint passes
• ✅ TypeScript typecheck passes
• ✅ 13 tests passing
• ✅ All new commands functional

The CLI now comprehensively covers all functionality available in the Krónan Public API.