Add links in high-traffic Copilot docs to app quickstart (#62618)

Author: saritai

content/copilot/concepts/chat.md

@@ -23,6 +23,7 @@ category:
 * A range of IDEs such as {% data variables.product.prodname_vscode %}, Xcode, and JetBrains IDEs
 * {% data variables.product.prodname_mobile %}
 * {% data variables.copilot.copilot_cli %}
+* {% data variables.copilot.github_copilot_app %}
 
 Different environments may have different features and capabilities, but the core functionality remains consistent across platforms. To explore the functionality available in each environment, see the [AUTOTITLE](/copilot/how-tos/chat-with-copilot) how-to guides and the [AUTOTITLE](/copilot/tutorials).
 

content/copilot/get-started/quickstart.md

@@ -22,6 +22,8 @@ category:
   - Configure Copilot
 ---
 
+This quickstart covers using {% data variables.product.prodname_copilot_short %} on the {% data variables.product.github %} website, in IDEs, and in {% data variables.product.prodname_windows_terminal %}. To try an agent-driven workflow in the {% data variables.copilot.github_copilot_app %}, see [AUTOTITLE](/copilot/how-tos/github-copilot-app/getting-started).
+
 ## Introduction
 
 <!-- --------------------- -->

content/copilot/get-started/what-is-github-copilot.md

@@ -50,6 +50,7 @@ Use {% data variables.product.prodname_copilot_short %} in the following places:
 * {% data variables.product.prodname_mobile %}, as a chat interface
 * {% data variables.product.prodname_windows_terminal %} Canary, through the Terminal Chat interface
 * The command line, through the {% data variables.product.prodname_cli %}
+* The {% data variables.copilot.github_copilot_app %}, a desktop application for agent-driven development. See [AUTOTITLE](/copilot/concepts/agents/github-copilot-app).
 * The {% data variables.product.github %} website
 
 See [AUTOTITLE](/copilot/get-started/features).

content/copilot/how-tos/chat-with-copilot/chat-in-ide.md

@@ -25,6 +25,8 @@ category:
 
 This guide describes how to use {% data variables.copilot.copilot_chat_short %} and agents to automate coding tasks by breaking them into steps, using tools to read files, edit code, and run commands, and self-correcting when something goes wrong. You can also ask general questions about software development, or specific questions about the code in your project. For more information, see [AUTOTITLE](/copilot/concepts/chat).
 
+To learn how to use {% data variables.product.prodname_copilot_short %} for agent-driven workflows in a desktop app, see [AUTOTITLE](/copilot/how-tos/github-copilot-app/getting-started).
+
 <!-- --------------------- -->
 <!-- VS Code -->
 <!-- --------------------- -->

content/copilot/how-tos/set-up/set-up-for-self.md

@@ -64,4 +64,6 @@ If you have your own {% data variables.product.prodname_copilot_short %} plan (i
 
 Start using {% data variables.product.prodname_copilot_short %} to help you write code faster and more efficiently. For all the ways you can use {% data variables.product.prodname_copilot_short %}, see [AUTOTITLE](/copilot/how-tos). {% data variables.product.prodname_copilot_short %} code suggestions, {% data variables.copilot.copilot_chat_dotcom_short %}, and {% data variables.copilot.copilot_chat_short %} in your IDE are a great place to start.
 
+To get started with agent-driven development in the {% data variables.copilot.github_copilot_app %}, see [AUTOTITLE](/copilot/how-tos/github-copilot-app/getting-started).
+
 To learn how to best use {% data variables.product.prodname_copilot_short %}, see [AUTOTITLE](/copilot/get-started/best-practices) and [AUTOTITLE](/copilot/concepts/prompting/prompt-engineering).