chore(test): add baseline e2e tests and percy snapshots

[tay1orjones]

Refs #8911

Adds baseline end to end tests for 5 components: AspectRatio, Breadcrumb, Button, ButtonSet, Modal. These baseline tests include a percy snapshot for each component.

Modal got some special treatment as an example for the future of how to test and snapshot components at the different breakpoint widths. Even with this, the modal tests all together only take .75s to execute!

Changelog

New

• test: e2e and percy snapshots

Testing / Reviewing

• Status checks should pass
• Percy status check (and UI) should register new snapshots for the 5 components listed in this PR.

If you're interested to see what the tests are doing:

• pull down this branch
• cd into packages/react
• run yarn cypress open-ct
• this will open the cypress gui in a new instance of chrome where you can select and run tests, and view the UI it's snapshotting and testing against.

[netlify]

✔️ Deploy Preview for carbon-elements ready!

🔨 Explore the source changes: 5435207

🔍 Inspect the deploy log: https://app.netlify.com/sites/carbon-elements/deploys/60d496b487ba6a0008fd21b9

😎 Browse the preview: https://deploy-preview-8958--carbon-elements.netlify.app

[netlify]

✔️ Deploy Preview for carbon-components-react ready!
Built without sensitive environment variables

🔨 Explore the source changes: 5435207

🔍 Inspect the deploy log: https://app.netlify.com/sites/carbon-components-react/deploys/60d496b425e5cd00076e8d45

😎 Browse the preview: https://deploy-preview-8958--carbon-components-react.netlify.app

[emyarod]

looks good to me

I don't have permission to approve the new snapshots on the percy dashboard

[tay1orjones]

@emyarod could you try going to browserstack.com, signing out, and then sign back in with SSO - then hop over to percy.io and sign in with browserstack? It recently switched over to SSO, so your old/non-ibm creds may not work.

[emyarod]

got it, thanks!

[netlify]

❌ Deploy Preview for carbon-react-next failed.

🔨 Explore the source changes: 5435207

🔍 Inspect the deploy log: https://app.netlify.com/sites/carbon-react-next/deploys/60d496b4e30c13000704f30e