Built-in specialized commands to convert wide and narrow data (pivot) for language

[fititnt]

• The general idea:
  • https://en.wikipedia.org/wiki/Wide_and_narrow_data
  • https://en.wikipedia.org/wiki/Entity%E2%80%93attribute%E2%80%93value_model
• HXLStandard reference tools equivalent
  • https://github.com/HXLStandard/hxl-proxy/wiki/Explode-data-filter
  • https://github.com/HXLStandard/hxl-proxy/wiki/Implode-data-filter

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This issue is about implement command specialized to convert from and to wide and narrow language data.

• Imediate use cases
  • TICO-19
    • https://github.com/EticaAI/tico-19-hxltm
      • https://github.com/tico-19/tico-19.github.io

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Edit:

• Changed from Expand-lists-filter to Implode-data-filter