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
+```