Timberbot API v0.7.1

• [breaking] /api/stockpile/good and /api/stockpile/capacity removed, use /api/building/storage
• [breaking] set_capacity removed, it was an unintended cheat
• [feature] /api/building/storage endpoint for piles, warehouses, and tanks with accept/obtain/supply/empty modes
• [feature] storageMode and allowedGood fields in buildings detail:full output
• [fix] all API errors are now actionable with context, valid options, and suggestions
• [fix] placement errors name the blocking object instead of generic "occupied"
• [fix] set_workers uses game setter, fires events, clamps minimum to 1
• [fix] set_workhours uses game setter, fires WorkingHoursChangedEvent
• [fix] storage uses Allow()/Disallow() so the UI updates correctly
• [fix] toon error output shows full response instead of just the error string
• [fix] unknown CLI parameters show the bad param and valid options
• [internal] 141 unit tests for json serializer and pure helpers
• [internal] shipped hooks removed, they blocked parallel tool calls