Function group list_folding

Function top fold a list into a single item Function group has those functions and groups:

• Function sum - Sum all the items in the list.
• Function any - Check if any of item in a list is true.
• Function all - Check if all the items in a list are true.
• Function join - Join all the items in the list into a String.
• Function first - The first item in a list.
• Function last - The last item in a list.

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