Fixes #275117: Copilot Chat extension is missing dist/suggestionsPanelWebview.js (#1795)

Author: dbaeumer

.vscodeignore

@@ -17,6 +17,7 @@ assets/walkthroughs/**
 !dist/copilotDebugCommand.js
 !dist/copilotCLIShim.js
 !dist/cli.js
+!dist/suggestionsPanelWebview.js
 !node_modules/@vscode/copilot-typescript-server-plugin/package.json
 !node_modules/@vscode/copilot-typescript-server-plugin/dist/*.js
 !node_modules/@github/copilot/**/package.json