fix: Add support for response_variable in ask_question service

- Added response schema definition in services.yaml for ask_question service
- Set supports_response=True flag when registering the service
- Fixed JSON syntax error in English translation file
- Added comprehensive documentation with examples for response_variable usage
- Users can now capture AI responses directly in variables without sensor delays

Resolves issue where scripts failed with 'Script does not support response_variable' error

custom_components/ha_text_ai/services.yaml

@@ -73,6 +73,39 @@ ask_question:
           max: 100000
           step: 1
           mode: box
+  response:
+    type: object
+    properties:
+      response_text:
+        type: string
+        description: The AI response text
+      tokens_used:
+        type: integer
+        description: Total number of tokens used
+      prompt_tokens:
+        type: integer
+        description: Number of tokens in the prompt
+      completion_tokens:
+        type: integer
+        description: Number of tokens in the completion
+      model_used:
+        type: string
+        description: The AI model that was used for the response
+      instance:
+        type: string
+        description: The instance name that was used
+      question:
+        type: string
+        description: The original question that was asked
+      timestamp:
+        type: string
+        description: ISO timestamp when the response was generated
+      success:
+        type: boolean
+        description: Whether the request was successful
+      error:
+        type: string
+        description: Error message if the request failed
 
 clear_history:
   name: Clear History