chore(common): add readme

Author: ntacheva

common/integration-with-microsoft-extensions-ai/AIPromptIntegrationWithMicrosoftExtensionsAI/AIPromptIntegrationWithMicrosoftExtensionsAI/readme.md

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+# AIPrompt integration with Microsoft.Extensions.AI
+
+## Overview
+
+This project demonstrates the [integration of the `Microsoft.Extensions.AI` package with the `AIPrompt` component](https://www.telerik.com/blazor-ui/documentation/common-features/microsoft-extensions-ai-integration). The integration enables AI-powered interactions using **Azure OpenAI**, leveraging the built-in [`IChatClient` service](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.ai.ichatclient?view=net-9.0-pp).
+
+## About `Microsoft.Extensions.AI`
+
+The [`Microsoft.Extensions.AI` package](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.ai?view=net-9.0-pp) provides an abstraction for AI-powered services, making it easy to integrate large language models (LLMs) into .NET applications. It simplifies AI interaction by offering dependency injection support and a structured way to handle AI-based workflows.
+
+## Integration with `AIPrompt` Component
+
+- The [`AIPrompt` component](https://www.telerik.com/blazor-ui/documentation/components/aiprompt/overview) is configured to use `Microsoft.Extensions.AI` for AI-driven prompts.
+- The project registers an [`IChatClient` service](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.ai.ichatclient?view=net-9.0-pp) in the `Program.cs` file.
+- The [`OnPromptRequest` event](https://www.telerik.com/blazor-ui/documentation/components/aiprompt/events#onpromptrequest) of the `AIPrompt` is not handled, so the component will automatically use the registered `IChatClient` service for to generate a response.
+- **Azure OpenAI** is used as the AI provider for generating responses.
+
+## Setup & Configuration
+
+To run the project successfully, you need to provide your **Azure OpenAI URI** and **API key**.
+
+### Steps:
+
+1. Open the `Program.cs` file.
+2. Locate the `IChatClient` service registration.
+3. Uncomment the service registration.
+3. Replace the placeholder values with your actual Azure OpenAI endpoint and API key:
+
+   ```csharp
+   new Uri("YOUR_AZURE_OPENAI_ENDPOINT"),
+   new AzureKeyCredential("YOUR_AZURE_OPENAI_CREDENTIAL"))
+   ```
+
+4. Run the application and interact with the `AIPrompt` component.
+