feat: initial implementation of Datacat

- Add project structure with UV/hatch build system
- Implement config module (env vars + YAML file support)
- Implement collector module for pylitterbot integration
- Implement metrics module for Datadog submission
- Support LR3, LR4, and Feeder Robot metrics
- Add event emission for state changes
- Add CLI with --once mode for single collection

config.example.yaml

@@ -0,0 +1,20 @@
+# Datacat Configuration Example
+# Copy this file to config.yaml and update with your credentials
+
+# Whisker/Litter Robot credentials
+whisker:
+  username: "your-email@example.com"
+  password: "your-password"
+
+# Datadog configuration
+datadog:
+  api_key: "your-datadog-api-key"
+  app_key: "your-datadog-app-key"  # Optional, required for some features
+  site: "datadoghq.com"  # Use "datadoghq.eu" for EU region
+  metric_prefix: "litterrobot"  # Prefix for all metrics
+
+# Collector settings
+collector:
+  poll_interval_seconds: 120  # How often to collect metrics (default: 2 minutes)
+  include_pets: true  # Include pet profile metrics
+  emit_events: true  # Emit Datadog events for state changes