TOC reorg

Author: anandmeg

docs/toc.yml

@@ -141,24 +141,24 @@
   items:
   - name: Get started
     href: ide/visual-studio-github-copilot-get-started.md
-  - name: Editor
+  - name: Code suggestions
     items:
     - name: Code Completions
       href: ide/visual-studio-github-copilot-extension.md
-    - name: Chat
-      href: ide/visual-studio-github-copilot-chat.md
     - name: Next Edit Suggestions
       href: ide/copilot-next-edit-suggestions.md
+  - name: Chat
+    items:
+    - name: Ask mode
+      href: ide/visual-studio-github-copilot-chat.md
     - name: Agent mode
       href: ide/copilot-agent-mode.md
     - name: MCP servers
       href: ide/mcp-servers.md
     - name: Copilot Edits
       href: ide/copilot-edits.md
-    - name: AI models for chat
+    - name: AI models
       href: ide/copilot-select-add-models.md
-  - name: Chat context
-    items:
     - name: Customize responses
       href: ide/copilot-chat-context.md
     - name: Manage context