v0.1.1

Added

• Nix flake (flake.nix) for building, running (nix run), and developing (nix develop)
• Nix installation instructions in README
• Live Open-Meteo temperature for outdoor plants when weather data is available (drying, watering due dates, calendar, CLI)
• Tests for temperature fallback and outdoor watering due dates

Changed

• Outdoor plants use fallback_temp_c from settings only when live weather is unavailable; indoor plants always use the fallback
• CLI modes (--status, --summary, --json) fetch weather once per run for outdoor calculations
• Updated README, user guide, and man kiri (EN/RU) to describe live vs fallback temperature behavior