docs(AI): Add note about obsolete Copilot extension

Author: dimodi

ai/copilot-extension.md

@@ -12,6 +12,10 @@ position: 10
 
 The Telerik Blazor [GitHub Copilot](https://github.com/features/copilot) extension provides proprietary context for the [Telerik UI for Blazor components](https://www.telerik.com/blazor-ui). The extension works as a Blazor AI code generator and can help you reach new levels of developer productivity. You can get useful tips and generate tailored code snippets that include Telerik UI for Blazor components and API.
 
+> [Microsoft is sunsetting GitHub Copilot extensions](https://github.blog/changelog/2025-09-24-deprecate-github-copilot-extensions-github-apps) on November 10, 2025, in favor of the Model Context Protocol (MCP) standard.
+>
+> From that date, the Telerik and Kendo UI AI Coding Assistants will be available exclusively through our [MCP servers](slug:ai-mcp-server). You can enjoy the same powerful capabilities that are delivered by a modern, open, and officially recommended standard.
+
 ## Prerequisites
 
 To use the Telerik GitHub Copilot extension for Blazor, you need to have:

ai/overview.md

@@ -22,6 +22,10 @@ The major differences between these tools are:
 * The MCP server is more powerful and can handle more complex prompts that require several requests to the AI model. An MCP-enabled client like Cursor or GitHub Copilot in **Agent** mode can directly suggest changes to your app and even rebuild it to verify the new AI generated code.
 * The responses of the GitHub Copilot extension may contain more explanations how to accomplish the task, and shorter or partial code snippets. When using the MCP server, the AI response is mostly code.
 
+> [Microsoft is sunsetting GitHub Copilot extensions](https://github.blog/changelog/2025-09-24-deprecate-github-copilot-extensions-github-apps) on November 10, 2025, in favor of the Model Context Protocol (MCP) standard.
+>
+> From that date, the Telerik and Kendo UI AI Coding Assistants will be available exclusively through our [MCP servers](slug:ai-mcp-server). You can enjoy the same powerful capabilities that are delivered by a modern, open, and officially recommended standard.
+
 ## Getting Started
 
 To use the Telerik Blazor AI Coding Assistant, you need: