Rename estimators and package

[grovduck]

This PR would close #6 by renaming all current estimators to specify that they are KnnRegressor estimators. It also changing the package name to scikit-learn-knn-regression, although we haven't yet renamed this in Github, but will before we merge this change. The imported module name also changes from sklearn_knn to sknnr.

To make the change locally, I did these steps:

1. renamed all instances of scikit-learn-knn to scikit-learn-knn-regression in all files
2. renamed all instances of sklearn_knn to sknnr in all files
3. renamed estimators to be suffixed with KnnRegressor (Raw, Euclidean, Mahalanobis) or Regressor (GNN, MSN)
4. changed directory name src\sklearn_knn to src\sknnr
5. hatch env prune to get rid of scikit-learn-knn and test environments
6. hatch shell to add scikit-learn-knn-regression environment
7. hatch run test:all to add test environment

(The only hiccup I had was that the old scikit-learn-knn hatch environments were not deleted, but I can do that manually).

[grovduck]

@aazuspan , a couple of possible changes to consider:

1. Do we want e.g. EuclideanKnnRegressor or EuclideanKNNRegressor? I'm OK either way.
2. Doing a bit of browsing on PyPI, it looks like both scikit-learn and sklearn prefixes are used for custom estimators. scikit-learn is more explicit, sklearn is shorter for an already long package name.

[aazuspan]

Looks great overall!

Do we want e.g. EuclideanKnnRegressor or EuclideanKNNRegressor? I'm OK either way.

I lean towards KNN just for consistency with GNN and MSN, but not a strong opinion.

Doing a bit of browsing on PyPI, it looks like both scikit-learn and sklearn prefixes are used for custom estimators. scikit-learn is more explicit, sklearn is shorter for an already long package name.

Good points. I guess if I had to choose I would go with the more explicit scikit-learn, but if you have any preference I'd happily defer to that.

[grovduck]

I lean towards KNN just for consistency with GNN and MSN

I agree. Changed to KNN in this commit.

I would go with the more explicit scikit-learn

I don't have a strong opinion, but agree that explicit is likely better.

[aazuspan]

Perfect, looks good to merge!

[grovduck]

Cool, I've renamed the repository to scikit-learn-knn-regression on Github and run this on my local repo:

git remote set-url origin git@github.com:lemma-osu/scikit-learn-knn-regression.git

[aazuspan]

Awesome, thanks!