Add root level script for running unit tests in monorepo mindset

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

jest.config.js

@@ -0,0 +1,4 @@
+const { monorepoRootConfig } = require("@k8slens/jest");
+
+module.exports = monorepoRootConfig(__dirname);
+

package.json

@@ -22,6 +22,7 @@
     "mkdocs:serve-local": "docker build -t mkdocs-serve-local:latest mkdocs/ && docker run --rm -it -p 8000:8000 -v ${PWD}:/docs mkdocs-serve-local:latest",
     "mkdocs:verify": "docker build -t mkdocs-serve-local:latest mkdocs/ && docker run --rm -v ${PWD}:/docs mkdocs-serve-local:latest build --strict",
     "test:unit": "lerna run --stream test:unit",
+    "test:unit:watch": "jest --watch",
     "test:integration": "lerna run --stream test:integration",
     "bump-version": "lerna version --no-git-tag-version --no-push",
     "precreate-release-pr": "cd packages/release-tool && npm run build",