Add Cypress test of package that uses embedded components

[garrettjstevens]

Fixes #2647

This adds a package in component_test off the monorepo root that uses create-react-app to make an app with an embedded react-linear-genome-view. When the whole repo is built in CI, each package creates a .tgz of itself and copies it to the test package. Then, when all the packages are build, the component_test packages is built and is set to resolve all the @jbrowse packages to their new builds. That way it's using all the most recent versions of the built packages.

Then in CI it runs a Cypress test to make sure the package built correctly.

This PR also fixes several cases where files in @jbrowse/core were using imports like import { ConfigurationSchema } from '@jbrowse/core/configuration' when they should be local imports like import { ConfigurationSchema } from './configuration', since those caused the component_test package to break.

[codecov]

Codecov Report

Merging #2649 (c4ba67b) into main (d95dc2c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2649   +/-   ##
=======================================
  Coverage   60.57%   60.57%           
=======================================
  Files         557      557           
  Lines       25999    25999           
  Branches     6343     6343           
=======================================
  Hits        15750    15750           
  Misses       9922     9922           
  Partials      327      327           

Impacted Files	Coverage Δ
packages/core/CorePlugin.ts	88.88% <ø> (ø)
packages/core/data_adapters/CytobandAdapter.ts	41.66% <ø> (ø)
...uggableElementTypes/models/InternetAccountModel.ts	39.13% <ø> (ø)
packages/core/ui/AssemblySelector.tsx	100.00% <ø> (ø)
packages/core/ui/DrawerWidget.tsx	80.76% <ø> (ø)

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[cmdcolin]

nice work on this one :) will definitely help with the relaibility