fix: add autoUpdater, session stubs, npm publishing support

- Add auto-updater.js EventEmitter stub for electron-updater MacUpdater
- Add session.fromPartition() stub for electron HTTP executor
- Fix app.js getAppPath/getName methods
- Update CLI to find napi .node files
- Fix package.json napi config (binaryName/targets)
- Add npm/darwin-arm64 platform package
- Add .npmignore for clean publish

.npmignore

@@ -0,0 +1,11 @@
+target/
+crates/*/src/
+crates/*/Cargo.toml
+crates/*/build.rs
+Cargo.toml
+Cargo.lock
+.git/
+.github/
+*.rs
+*.lock
+*.md