feat: init sentry

[LuckyIntegral]

This pull request introduces Sentry error tracking to the client application, enabling both build-time and runtime error monitoring. It also adds a development-only button to trigger test errors, and updates dependencies to support Sentry integration.

Sentry Integration:

• Added Sentry as a dependency (@sentry/react, @sentry/vite-plugin) and updated pnpm-lock.yaml to include all required Sentry packages. [1] [2] [3]
• Configured Sentry initialization in client/app/root.tsx using the DSN from environment variables, enabling runtime error tracking. [1] [2]
• Integrated the Sentry Vite plugin in client/vite.config.ts for build-time error reporting and sourcemap upload. [1] [2]
• Added .env.sentry-build-plugin to .gitignore to prevent committing sensitive Sentry configuration.

Development Tools:

• Added a new ErrorButton component that throws a test error when clicked, and included it in the Welcome screen for development builds only. [1] [2] [3]

Dependency Updates:

• Updated pnpm-lock.yaml with new and upgraded packages required for Sentry and its plugins, as well as related utilities. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

[LuckyIntegral]

Ideally, unsuccessful logins should also be logged, as well as whatever else you find important