Add 'timeline' style for the 'dr-cabal profile' command about dr-cabal HOT 7 OPEN

@diasbruno I propose to have just options --stacked and --timeline with the --stacked being the default (I think timeline is a better name than interval now that I think about it). I don't anticipate adding a variety of styles to the tools so having a shorter CLI would be my preference here.

My idea is two have two separate modules under the DrCabal.Profile.* namespace: *.Stacked and *.Timeline. So the DrCabal.Profile just pattern matches on the values of the Style data type and calls corresponding functions.

I don't expect lots of code sharing between calculations and visualisation of these two different methods. Reading a JSON file and grouping a Map by libraries looks like the only things that can be reused. But if I were implementing this, I would write a new implementation from scratch completely and only after that see if I can refactor anything. Trying to reduce duplication may actually result in less readable and more confusing code so let's not do this prematurely 👍🏻

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Sounds great. I'll move things to the Stacked module first and the argument from cli (with default).

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In this case, are you thinking of grouping each package, start to finish in each row, or display each step of each package separate in order of execution?

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@diasbruno I'm thinking about grouping each package. So almost like the existing implementation but with blank spaces (probably using the space character) between phases where there's no progress on each phase.

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Nice. What argument should we use for this '--format' or '--style'?

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Like

dr-cabal profile --style {stacked|interval}

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I'll refactor/extract to a module what is implemented now, so it would help to add other styles.

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