registry: SecurityPanelController with Arm.Response and its errors

Alexa.SecurityPanelController is described from its page: version 3 (the stub of 1.5.2 said 1), armState and the
four alarms, Arm and Disarm. ctx.respond() answers Arm with Arm.Response under the namespace of the interface,
its payload checked (exitDelayInSeconds 0 to 255, bypassedEndpoints), and Disarm with a Response. A Disarm
carries the PIN the user said when the panel is declared with supportedAuthorizationTypes; the handler checks
it and answers UNAUTHORIZED, which goes under Alexa.SecurityPanelController like the five other error types.

A panel declared without options lists armState, where 1.5.2 listed no property; alarms are declared.
17 examples of the two pages are saved as fixtures. 215 tests pass, 207 before.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

test/fixtures/alexa-docs/alexa-securitypanelcontroller/Disarm.directive.json

@@ -0,0 +1,25 @@
+{
+  "directive": {
+    "header": {
+      "namespace": "Alexa.SecurityPanelController",
+      "name": "Disarm",
+      "messageId": "Unique version 4 UUID",
+      "correlationToken": "Opaque correlation token",
+      "payloadVersion": "3"
+    },
+    "endpoint": {
+      "scope": {
+        "type": "BearerToken",
+        "token": "OAuth2.0 bearer token"
+      },
+      "endpointId": "Endpoint ID",
+      "cookie": {}
+    },
+    "payload": {
+      "authorization": {
+        "type": "FOUR_DIGIT_PIN",
+        "value": "1234"
+      }
+    }
+  }
+}