chore: import upstream snapshot with attribution

examples/prompty/eval-basic/README.md

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+# Basic Eval
+Basic evaluator prompt for QA scenario
+
+## Prerequisites
+
+Install `promptflow-devkit`:
+```bash
+pip install promptflow-devkit
+```
+
+## Run prompty
+
+- Prepare your Azure OpenAI resource follow this [instruction](https://learn.microsoft.com/en-us/azure/cognitive-services/openai/how-to/create-resource?pivots=web-portal) and get your `api_key` if you don't have one.
+- Setup environment variables
+
+Ensure you have put your azure OpenAI endpoint key in [.env](../.env) file. You can create one refer to this [example file](../.env.example).
+
+```bash
+cat ../.env
+```
+
+- Test flow
+```bash
+pf flow test --flow eval.prompty --env --inputs sample.json
+```

examples/prompty/eval-basic/eval.prompty

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+---
+name: basic evaluate 
+description: basic evaluator for QA scenario
+model:
+  api: chat
+  configuration:
+    type: azure_openai
+    azure_deployment: gpt-4o
+    api_key: ${env:AZURE_OPENAI_API_KEY}
+    azure_endpoint: ${env:AZURE_OPENAI_ENDPOINT}
+  parameters:
+    temperature: 0.2
+    max_tokens: 200
+    top_p: 1.0
+    response_format:
+      type: json_object
+
+inputs: 
+  question:
+    type: string
+  answer:
+    type: string
+  ground_truth:
+    type: string
+outputs:
+  score:
+    type: string
+  explanation:
+    type: string
+---
+system:
+You are an AI assistant. 
+You task is to evaluate a score for the answer based on the ground_truth and original question.
+This score value should always be an integer between 1 and 5. So the score produced should be 1 or 2 or 3 or 4 or 5.
+The output should be valid JSON.
+
+**Example**
+question: "What is the capital of France?"
+answer: "Paris"
+ground_truth: "Paris"
+output:
+{"score": "5", "explanation":"paris is the capital of France"}
+
+user: 
+question: {{question}}
+answer: {{answer}}
+statement: {{statement}}
+output:

examples/prompty/eval-basic/sample.json

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+{
+  "question": "what's the capital of China?",
+  "answer": "Shanghai",
+  "ground_truth": "Beijing"
+}