Copy Import for scikit-learn docs

Adds a "Copy import" button next to every class and function signature in the scikit-learn documentation.

Open any page on scikit-learn.org and a "Copy import" button appears next to the heading. Click it and the import statement is on your clipboard: sklearn.linear_model.LinearRegression(...) -> from sklearn.linear_model import LinearRegression sklearn.ensemble.RandomForestClassifier(...) -> from sklearn.ensemble import RandomForestClassifier sklearn.model_selection.GridSearchCV(...) -> from sklearn.model_selection import GridSearchCV sklearn.utils.extmath.randomized_svd(...) -> from sklearn.utils.extmath import randomized_svd PRIVACY This extension requests no permissions at all. Look at the permission list when you install it: it is empty. • No browsing history, no storage, no cookies, no account. • No network requests. Nothing is sent anywhere. • No analytics, no tracking, no AI services. • Everything happens locally, from text already visible on the page you are reading. It runs only on https://scikit-learn.org/ and nowhere else. Open source. Not affiliated with, endorsed by, or sponsored by the scikit-learn project; "scikit-learn" is used only to describe the documentation the extension works on.