v2.0.0

• Adopted the @microsoft/vscode-ext-webview package — the tRPC transport, panel facade, and React hooks that previously lived in a local src/webviews/api/ copy are now consumed from the published npm package. This repository is the canonical all-in (React + tRPC + webview) reference consumer.
• New src/webviews/_integration/ layer — consumer-owned glue over the package: root appRouter, the trpc telemetry adapter, the openAppWebview panel preset, the useTrpcClient wrapper, and the WebviewRegistry.
• Panels open via openAppWebview — construction-only views use the factory over the package's openWebview instead of WebviewController subclasses.
• Client-first useTrpcClient — the hook now returns the tRPC client directly (const trpcClient = useTrpcClient()); WithWebviewContext/useConfiguration come from @microsoft/vscode-ext-webview/react.
• Removed the local src/webviews/api/ folder and WebviewContext.tsx (now provided by the package).
• Docs — added migration.md for moving from the local copy to the package, refreshed the README and Copilot skills, and rebuilt the "Add a New View" tutorial as commit-by-commit steps.