feat: feature ideas page

[LeoniePeters]

• Adds new feature-ideas page
  • fetches page content (incl. features) from Contentful
• Adds new FeatureIdeas component
  • renders an error message when no features with custom illustration
  • renders content card for each feature with custom footer with vote button
  • mock voting functionality (to be updated when db and API are ready)
• Adds Feature ideas link to the side bar navigation (behind feat toggle)
• Refactors ContentCard to optionally have a link
• Refactors ErrorMessage to have a titleTag prop, remove redundant gridless prop
• Adds icons: feature-ideas (for sidebar menu), thumbsup and thumbsup-outlined
• Adds FeatureIdeas component to the style guide

[github-actions]

JIRA ticket: EC-6892

[github-actions]

Preview deployment: https://pr-2420.portal-js.dev.eanadev.org/

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
94.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud