feat: update client package configuration and dependencies

- Added new dependencies for Rollup plugins and updated existing ones in package.json and package-lock.json.
- Introduced a new Rollup configuration file for building the client package.
- Refactored build scripts to include a dedicated build command for the client.
- Updated TypeScript configuration for improved module resolution and type declaration output.
- Integrated a Toast component from the client package into the main App component.

packages/client/src/index.ts

@@ -0,0 +1,11 @@
+// Components
+export { default as Toast } from './components/Toast';
+
+// Hooks
+export * from './hooks';
+
+// Common types
+export * from './common/types';
+
+// Store
+export * from './store';