docs: add Animals module to README + CLAUDE.md

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -15,8 +15,10 @@ Live at **http://192.168.0.5:8053**.
 - **Inventory** — durable **items** that nest (boxes within rooms within
   buildings), with labels, attachments, and logs. Shares the same location spine
   as the garden.
+- **Animals** — pets & livestock with their own logs, placed on the shared
+  location tree; reminders can be linked to an animal.
 - **Reminders** — one-off or recurring tasks (every N days / monthly / yearly),
-  optionally linked to a plant.
+  optionally linked to a plant or animal.
 - **REST API** (`/api/v1/*`) — personal access **tokens** with per-scope
   permissions (read plants, log harvests, …) for phone shortcuts, Home Assistant,
   and automation.