feat(design): remove error message dependency on form-field

[xelaint]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/graycoreio/daffodil/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

daff-error-message depends on daff-form-field. It cannot be used if we create a daff-solo-field component.

Part of: #416

What is the new behavior?

Move daff-error-message outside of daff-form-field and create its module so that it can be used in other form components.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[damienwebdev]

Should the error message have a public api? Should it be exported?

[damienwebdev]

lgtm