Implement cookie-pick feature

[nalch]

TODO: Put description here

Fixes: #1134

[codecov-io]

Codecov Report

Merging #1133 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1133   +/-   ##
======================================
  Coverage     100%    100%           
======================================
  Files          18      19    +1     
  Lines         783     843   +60     
======================================
+ Hits          783     843   +60

Impacted Files	Coverage Δ
cookiecutter/cookie_pick.py	100% <100%> (ø)
cookiecutter/main.py	100% <100%> (ø)	⬆️
cookiecutter/cli.py	100% <100%> (ø)	⬆️

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[ssbarnea]

Closing this for several reasons: outdated, never got attention from anyone and maybe the most important aspect: it does not solve an existing bug or feature request. By having a bried look at this change I say "that is a lot of code added for something that looks like a corner case".

If you really want this to happen, you should better start with a feature request that describes very well the use case. If it manages to get the buy-in from few others, it worth creating a PR to fix it.

[nalch]

Maybe the look was too brief. The PR solves the linked feature request #1134. On top of that the added documentation gives details about the use case.
This exact use case of migrating cookiecutter changes came up again and again over the years (f.e. #784 and #1173).

That being said, I'm just interested in the functionality to go into cookiecutter. So I'll leave it to the newer PR.

[ssbarnea]

@nalch I know, the project lacked active maintenance for a very long time but hopefully this we are going to revive its community. Few months ago I was ready to scrap it from other projects where I was using due to this but recently I become core and I can help a little bit keeping it afloat.

As you mentioned the original feature request, I added it to the description and also added a comment there. I will also reopen this until we can make a decision.

[nalch]

No worries. Let's take the newer pull request instead to get the functionality in.