registry: ThermostatController 3.2 and ThermostatController.Schedule

The thermostat is described from its page: one, two or three setpoints with holdUntil, AdjustTargetTemperature,
SetThermostatMode with the six modes (EM_HEAT is new), ResumeSchedule, adaptiveRecoveryStatus, and its seven error
types under Alexa.ThermostatController. A declaration gives supportedModes, supportsScheduling and the properties
the device has; without them discovery is what 1.5.2 sent: HEAT, COOL, AUTO, OFF and the three setpoints with
thermostatMode. supportedModes without HEAT or COOL is refused where it is declared.

ThermostatController.Schedule replaces its stub. Wire change for a 1.x declaration of it: version 3.2 (was 1) and
scheduleEnabled listed (was nothing). SetAdaptiveRecovery is taken only with supportsAdaptiveRecovery.

24 examples of three pages are saved as fixtures; the page folds the SetWeeklySchedule example away, its payload
is tested from the tables. 207 tests pass, 191 before.

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

test/fixtures/alexa-docs/alexa-thermostatcontroller/SetTargetTemperature-dual.directive.json

@@ -0,0 +1,32 @@
+{
+  "directive": {
+    "header": {
+      "namespace": "Alexa.ThermostatController",
+      "name": "SetTargetTemperature",
+      "messageId": "Unique version 4 UUID",
+      "correlationToken": "Opaque correlation token",
+      "payloadVersion": "3.2"
+    },
+    "endpoint": {
+      "scope": {
+        "type": "BearerToken",
+        "token": "OAuth2 bearer token"
+      },
+      "endpointId": "endpoint id",
+      "cookie": {}
+    },
+    "payload": {
+      "lowerSetpoint": {
+        "value": 68,
+        "scale": "FAHRENHEIT"
+      },
+      "upperSetpoint": {
+        "value": 72,
+        "scale": "FAHRENHEIT"
+      },
+      "holdUntil": {
+        "duration": "PT30M"
+      }
+    }
+  }
+}