1511 error count

[scottqueen-bixal]

PR Summary

This works to refactor or error handling to support reactive field count on errors

Related Github Issue

• Fixes Include error count in alert #1511

Detailed Testing steps

• pull changes locally
• cd benefit-finder
• npm install
• npm run start

• navigate to first step of the form, without entering values click "continue"
• ensure an error is thrown
• ensure the alert banner is focused
• ensure the number of errors indicated in the alert is equal to the number of inputs/selects that have errors
• ensure the fields with errors have red borders around them

expected:

• begin to resolve errors
• ensure that resolving an error resolves its css notification
• ensure that resolving an error updates the count in the alert

expected:

• without resolving all errors CLICK "continue" button again
• ensure that you can not progress forward
• ensure the alert banner is focused
• ensure that when all errors are resolved, the alert banner is not displayed and user can progress forward

[scottqueen-bixal]

closing in favor of #1528