@grafana/e2e: added support for plugin repositories (#22546)

* Minor changes

* Include Cypress support files in published package

* Added CLI

… with support for custom configurations (which Cypress does not currently support by default):

  * Loads cypress.json from @grafana/e2e as a base config (via a custom Cypress plugin)
  * Sets default values for project-level Cypress files (tests, etc)
  * Optionally loads a cypress.json from the current working directory as overrides

* Updated lockfile

packages/grafana-e2e/bin/grafana-e2e.js

@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+
+// This file is used only for internal executions
+
+require('ts-node').register({
+  project: `${__dirname}/../tsconfig.json`,
+  transpileOnly: true,
+});
+
+require('../src/cli/index.ts').default();