deprecation of copilot extension (#1856)

* Update copilot-extension.md

chore: add banner for deprecation

* Update overview.md

Author: dnikolov-prg

ai-coding-assistant/copilot-extension.md

@@ -15,6 +15,10 @@ The Telerik Reporting [GitHub Copilot](https://github.com/features/copilot) exte
 
 It enables AI-powered IDEs and tools to generate more accurate, tailored code that leverages [Telerik Reporting](https://www.telerik.com/products/reporting.aspx) APIs. You can ask complex questions about integrating Telerik Reporting into web applications, request specific implementations, and receive comprehensive code solutions.
 
+> [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 for the GitHub Copilot Extension
 
 In addition to the [prerequisites for the AI Coding Assistant]({%slug ai-coding-assistant%}#prerequisites-for-the-ai-coding-assistant), before using the Telerik Reporting GitHub Copilot extension, ensure you have:
@@ -87,4 +91,4 @@ A Telerik [Subscription license](https://www.telerik.com/purchase.aspx?filter=we
 * [Telerik Reporting MCP Server]({%slug ai-mcp-server%})
 * [Telerik Reporting Prompt Library]({%slug ai-prompt-library%})
 * [Kendo UI for Angular GitHub Copilot Extension](https://www.telerik.com/kendo-angular-ui/components/ai-assistant/copilot-extension)
-* [Telerik Blazor GitHub Copilot Extension](https://www.telerik.com/blazor-ui/documentation/ai/copilot-extension)
+* [Telerik Blazor GitHub Copilot Extension](https://www.telerik.com/blazor-ui/documentation/ai/copilot-extension)

ai-coding-assistant/overview.md

@@ -31,6 +31,10 @@ To use the Telerik Reporting AI Coding Assistant, you need:
 * An application that uses [Telerik Reporting]({%slug telerikreporting/welcome-to-telerik-reporting!%}).
 * A Telerik [Subscription license](https://www.telerik.com/purchase/faq/licensing-purchasing) is recommended in order to use the Telerik Reporting AI Coding Assistant without restrictions. Perpetual license holders and trial users can make a limited number of requests per year.
 
+> [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.
+
 ## Intended Use
 
 >warning Always double-check the code and solutions proposed by any AI-powered tool before applying them to your project.
@@ -113,4 +117,4 @@ Please make sure you are familiar with the terms and privacy policy of your sele
 * [Telerik Reporting MCP Server]({%slug ai-mcp-server%})
 * [Telerik Reporting Prompt Library]({%slug ai-prompt-library%})
 * [Kendo UI for Angular GitHub Copilot Extension](https://www.telerik.com/kendo-angular-ui/components/ai-assistant/copilot-extension)
-* [Telerik Blazor GitHub Copilot Extension](https://www.telerik.com/blazor-ui/documentation/ai/copilot-extension)
+* [Telerik Blazor GitHub Copilot Extension](https://www.telerik.com/blazor-ui/documentation/ai/copilot-extension)