More Updates to Read the Docs (#856)

docs/source/building_applications/safety.md

@@ -0,0 +1,21 @@
+## Safety Guardrails
+
+Safety is a critical component of any AI application. Llama Stack provides a Shield system that can be applied at multiple touchpoints:
+
+```python
+# Register a safety shield
+shield_id = "content_safety"
+client.shields.register(
+    shield_id=shield_id,
+    provider_shield_id="llama-guard-basic"
+)
+
+# Run content through shield
+response = client.safety.run_shield(
+    shield_id=shield_id,
+    messages=[{"role": "user", "content": "User message here"}]
+)
+
+if response.violation:
+    print(f"Safety violation detected: {response.violation.user_message}")
+```