feat: added new summary component with config, can render child nodes

[adamhaeger]

Description

Related Issue(s)

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Verification/QA

• Manual functionality testing
  • I have tested these changes manually
  • Creator of the original issue (or service owner) has been contacted for manual testing (or will be contacted when released in alpha)
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• Automated tests
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• UU/WCAG (follow these guidelines until we have our own)
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• User documentation @ altinn-studio-docs
  • Has been added/updated
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• Support in Altinn Studio
  • Issue(s) created for support in Studio
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