New template for PortalJS

[anuveyatsu]

See live demo here: https://portaljs-frontend-template.vercel.app/

Acceptance criteria

• We use the new template as default in portaljs cloud

Tasks

• Identify what's missing in the new template vs current one.
• Decide which missing features we want to implement.
• Implement the features.
• Implement the new template as default for PortalJS Cloud.

[willy1989cv]

• Upgrade next version
• Fix vulnerabilities issues

Features we need to implement in new template

• Cached data
• Namespace isolation: use PortalJS prefix (org--dataset-name)
• i18n: translations
• Visualizations
• Previews
  • CSV
  • PDF
  • XLS/XLSX
  • JSON
  • Shapefile
  • GeoJSON
• Static render
• SEO