Add PlantGuide iOS app with plant identification and care management

- Implement camera capture and plant identification workflow
- Add Core Data persistence for plants, care schedules, and cached API data
- Create collection view with grid/list layouts and filtering
- Build plant detail views with care information display
- Integrate Trefle botanical API for plant care data
- Add local image storage for captured plant photos
- Implement dependency injection container for testability
- Include accessibility support throughout the app

Bug fixes in this commit:
- Fix Trefle API decoding by removing duplicate CodingKeys
- Fix LocalCachedImage to load from correct PlantImages directory
- Set dateAdded when saving plants for proper collection sorting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Docs/ServerDownload.md

@@ -0,0 +1,15 @@
+  # 1. Extract
+  unzip PlantGuide-Server.zip
+  cd PlantGuide-Server
+
+  # 2. Install Python deps
+  pip3 install -r requirements.txt
+
+  # 3. Start downloading ALL 2,278 plants (runs in background)
+  ./start_downloads.sh --all
+
+  # 4. Check progress anytime
+  ./status.sh
+
+  # 5. Stop if needed
+  ./stop_downloads.sh