feat(progress): the progress cmd for #153

[Sojamann]

This is the first draft for #153

Note:

• no code comments exist as of yet

[Sojamann]

I think additionally it would also be cool if one could either do

... task .... | gum progress --eta --limit 1000 --elapsed

so that the user could enable printing of some stats

or what tqdm does ... allowing the user to specify the layout of the bar

# when there is a limit
... task ..... | gum progress --limit 1000 --fmt '{{ .Title }} - {{ .Bar }} [{{ .Elapsed }} ~ ETA: {{ .ETA }}]'

# when there is no limit
... task ..... | gum progress --fmt '{{ .Title }} - Step: {{ .Iter }} [{{ .Elapsed }} ~ ETA: {{ .ETA }}]'

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is this too much or something actually useful? @olivertzeng

[olivertzeng]

Great at least it works

[Sojamann]

Going to change the help strings of the cli to show how a format string can be built..

[Sojamann]

Rebased and squashed onto current main -> can be reviewed