Fix documentation build and API

[smoia]

Closes #

Proposed Changes

-

-

Change Type

• [ ] bugfix (+0.0.1)
• [ ] minor (+0.1.0)
• [ ] major (+1.0.0)
• [ ] refactoring (no version update)
• [ ] test (no version update)
• [ ] infrastructure (no version update)
• [ ] documentation (no version update)
• [ ] other

Checklist before review

• [ ] I added everything I wanted to add to this PR.
• [ ] [Code or tests only] I wrote/updated the necessary docstrings.
• [ ] [Code or tests only] I ran and passed tests locally.
• [ ] [Documentation only] I built the docs locally.
• [ ] My contribution is harmonious with the rest of the code: I'm not introducing repetitions.
• [ ] My code respects the adopted style, especially linting conventions.
• [ ] The title of this PR is explanatory on its own, enough to be understood as part of a changelog.
• [ ] I added or indicated the right labels.
• [ ] I added information regarding the timeline of completion for this PR.
• [ ] Please, comment on my PR while it's a draft and give me feedback on the development!

[codecov[bot]]

Codecov Report

Merging #80 (8765dac) into master (7cfaab3) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 8765dac differs from pull request most recent head 768a4c4. Consider uploading reports for the commit 768a4c4 to get more accurate results

@@           Coverage Diff           @@
##           master      #80   +/-   ##
=======================================
  Coverage   90.93%   90.93%           
=======================================
  Files          14       14           
  Lines        1235     1235           
=======================================
  Hits         1123     1123           
  Misses        112      112           

Files	Coverage Δ
nigsp/operations/laplacian.py	95.78% <ø> (ø)