docs: update CHANGELOG and README for v2.0.0 release

1.4.2

Fix Windows build and E2E test compatibility

- Replace Buffer with Uint8Array in shared RegisterData type to fix Vite browser externalization error on Windows
- Update E2E test to handle splash screen on Windows/Linux (main window is always last in windows array)
- Update test expectations to use Uint8Array instead of Buffer

The Buffer type from Node.js 'buffer' module was being imported in shared code used by both main (Node.js) and renderer (browser) processes. Vite externalizes Node.js built-ins for browser builds, causing build failures on Windows. Since Buffer extends Uint8Array, this change is fully backward compatible with existing main process code that creates actual Buffer instances.

1.4.0

enhance feature list

git ignore yarn berry files