Review all the .gitignore files in the templates and the starters

[ankatiyar]

Discussed in #3635

^{Originally posted by grofte February 20, 2024}
If I make a new Kedro project the lines

# keep also the example dataset
!data/01_raw/*

are in .gitignore file. At the same time you have written in the README that users should not delete any of the lines you have added to .gitignore. I feel like this is going to hurt a lot of newbies that accidentally add a big dataset to git and then struggle to get rid of it. Even for the example with spaceflights I think it's a terrible idea to add the data to git.

PS I have not installed the example.

PPS I could not find it in your codebase or I would have written a PR. At the same time it's not a bug, just a terrible choice.

[ankatiyar]

@noklam #3635 (reply in thread)

[noklam]

https://github.com/kedro-org/kedro-starters/blob/a829a9b29b9f0020994e71d69dcadd100caf8d7b/spaceflights-pandas-viz/%7B%7B%20cookiecutter.repo_name%20%7D%7D/.gitignore#L11-L15

Line 15 doesn't seem necessasary, can we also review if it's actually needed.

[Galileo-Galilei]

While we're at it, we should check for the mlruns/ folder of mlflow. I think the project template has been updated, but not the starters: #3765

[ankatiyar]

Completed in #4302 & kedro-org/kedro-starters#250