Drop lerna and switch to npm workspaces

.storybook/Container.scss

@@ -1,5 +1,5 @@
 /*
-Copyright 2019-2021 The Tekton Authors
+Copyright 2019-2022 The Tekton Authors
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
@@ -13,5 +13,5 @@ limitations under the License.
 
 @import '../src/scss/App';
 
-@import '@tektoncd/dashboard-components/dist/components/Graph/Graph.scss';
-@import '@tektoncd/dashboard-components/dist/components/Graph/ZoomablePipelineGraph.scss';
+@import '@tektoncd/dashboard-components/src/components/Graph/Graph.scss';
+@import '@tektoncd/dashboard-components/src/components/Graph/ZoomablePipelineGraph.scss';

docs/dev/README.md

@@ -123,8 +123,6 @@ Make sure that the backend service running in the cluster is proxied using `kube
 e.g. to connect your local dev frontend to the Dashboard deployed on the robocat cluster:
 `API_DOMAIN=https://dashboard.robocat.tekton.dev/ npm start`
 
-**Note:** If modifying any of the sub-packages (e.g. components or utils in https://github.com/tektoncd/dashboard/tree/main/packages), you'll need to run `npm run bootstrap` to ensure those packages are correctly built and linked before starting the dev server or running a build. This is done automatically by `npm ci` or `npm install` so you may not have to run it directly depending on your workflow.
-
 ## Quick setup for local cluster
 
 The Dashboard repository contains a script that will provision a [`kind` cluster](https://kind.sigs.k8s.io/) named 'tekton-dashboard' with the latest releases of Tekton Pipelines and Tekton Triggers installed, as well as a version of the Tekton Dashboard which can be customised by providing additional parameters matching those expected by the installer script described earlier.