feat: update @cypress/schematic to NOT remove e2e folder or dependencies.

[admah]

User facing changelog

• update @cypress/schematic to NOT remove e2e folder or dependencies
• update @cypress/schematic inserted package.json commands to match docs
• update @cypress/schematic README and LICENSE attributions

Additional details

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has the original issue or this PR been tagged with a release in ZenHub?
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?
• Have new configuration options been added to the cypress.schema.json?

[linear]

DX-310 Update README with following copy at bottom

The Cypress Angular Schematic package was made possible by the original work of the Briebug team and the contributors of @briebug/cypress-schematic.

@briebug/cypress-schematic served as the starting point for improvements and new functionality the Cypress team will continue to develop along with the community.

[cypress-bot]

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• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.
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[cypress]

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Test summary

17968 • 0 • 214 • 7 • 0

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Run details

Project	cypress
Status	Passed
Commit	a1d5b79
Started	May 26, 2021 5:57 PM
Ended	May 26, 2021 6:09 PM
Duration	12:13 💡
OS	Linux Debian - 10.8
Browser	Multiple

View run in Cypress Dashboard ➡️

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[amirrustam]

@admah I think we got to think more about the copy for presenting the migration guide link, but this is all valuable to folks in the current state. So we can ship it.