Add -auto-order option

[birchb1024]

If the -auto-order option is given, then assess the relative 'value' of each token at each level. Re-order the input and re do so that the hierarchy makes more sense. For example one way to re-order is to place tokens with higher counts higher in the hierarchy. Thought-experiment. Given:

12:34  01-01-2022 
12:43  01-01-2022 
12:45  01-01-2022 
12:50  01-01-2022 
00:10  02-01-2022 
00:12  02-01-2022 
00:34  02-01-2022 

We want

frangipanni -no-fold -counts
2022: 7
    01: 7
        01: 4
            12: 4
                34: 1
                43: 1
                45: 1
                50: 1
        02: 3
            00: 3
                10: 1
                12: 1
                34: 1

But as you can see there is ambiguity here, how do we know what the output order is, in fact?

[birchb1024]

Maybe this needs to be in a seperate filter, ie <data.csv auto-reorder | frangipanni. Perhaps the concept of re-ordering columns only makes sense for tabular data. Frangipanni does not have any concept of rows (lines) being organised into columns, it assumes they are all diverse. Hmmm...