[ENH] Correct broken source links for set_params and get_params in Aeon estimator docs

[Kaustbh]

Reference Issues/PRs

Fixes: #2752

What does this implement/fix? Explain your changes.

This PR fixes broken "Source" links in the Aeon documentation for the set_params and get_params methods.
Currently, the autogenerated links incorrectly point to sklearn paths such as:

"https://github.com/aeon-toolkit/aeon/blob/main/sklearn/base.py#L255-L297"
which leads to a 404 error, since these methods are inherited from sklearn.BaseEstimator and not directly implemented in Aeon code.

Fixes broken "Source" links by modifying conf.py to exclude non-Aeon paths (e.g., sklearn/base.py) from autogenerated documentation links.

Does your contribution introduce a new dependency? If yes, which one?

Any other comments?

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[MatthewMiddlehurst]

Please update your PR text, this does not represent the contents of the PR. From what I can tell clicking on the source link in the PR website build this does not actually change anything?

[Kaustbh]

Yes it is not working for the local build, since the generated source link still point to the local sklearn installation,
ex. https://github.com/aeon-toolkit/aeon/blob/myaeon/lib/python3.12/site-packages/sklearn/base.py#L251-L293 because of which the new added condition doesn't work, but I think after deployment, this change should take effect as expected by preventing broken links to external libraries like sklearn.