Test experimental

[henrydingliu]

Summary of Changes

Related GitHub Issue(s)

Additional Context for Reviewers

• I passed tests locally for both code (uv run pytest) and documentation changes (uv run jb build docs --builder=custom --custom-builder=doctest)

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Note

Low Risk
Documentation and docstring markup only; no changes to estimation or core package behavior.

Overview
This PR is mostly documentation build and presentation tweaks, with no runtime library logic changes.

The Development class docstring fixes a Sphinx typo: .. notes :: becomes .. note :: so the “Order of Drop Operations” block renders correctly. Autosummary class templates now also exclude set_predict_request (along with other sklearn request setters) so those helpers don’t clutter generated API pages.

The book TOC now links the API section to library/api.md instead of library/api.rst, matching the markdown-based API index. The Getting Started landing page heading is normalized to a single # title instead of the previous ## line.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.92%. Comparing base (6c5a020) to head (fefc903).
⚠️ Report is 1 commits behind head on experimental.

Additional details and impacted files

@@              Coverage Diff              @@
##           experimental     #910   +/-   ##
=============================================
  Coverage         86.92%   86.92%           
=============================================
  Files                87       87           
  Lines              4942     4942           
  Branches            625      625           
=============================================
  Hits               4296     4296           
  Misses              456      456           
  Partials            190      190           

Flag	Coverage Δ
unittests	86.92% <ø> (ø)

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