feat: render design examples in daffio

[griest024]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/graycoreio/daffodil/blob/develop/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
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Fixes: #2903

What is the new behavior?

• moves the example viewer components to a docs-components package
• changes the example rendering from a custom element based one to a component outlet one
• adds custom element support for the example viewer container so it can be rendered when the markdown is rendered with innerHtml
• converts example components to standalone so that they can be dynamically rendered
• extracts internal package ignore constant in dgeni and adds new packages

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[griest024]

@xelaint Can you acceptance test that design-land and daffio look correct to you?