chore: extract event-emitter from core

Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

packages/open-lens/package.json

@@ -184,6 +184,7 @@
     "@k8slens/application-for-electron-main": "^6.5.0-alpha.3",
     "@k8slens/core": "^6.5.0-alpha.8",
     "@k8slens/ensure-binaries": "^6.5.0-alpha.4",
+    "@k8slens/event-emitter": "^1.0.0-alpha.1",
     "@k8slens/feature-core": "^6.5.0-alpha.3",
     "@k8slens/keyboard-shortcuts": "^1.0.0-alpha.3",
     "@k8slens/kubectl-versions": "^1.0.0-alpha.2",