Add model SANN

[martin-carrasco]

Checklist

• My pull request has a clear and explanatory title.
• My pull request passes the Linting test.
• I added appropriate unit tests and I made sure the code passes all unit tests. (refer to comment below)
• My PR follows PEP8 guidelines. (refer to comment below)
• My code is properly documented, using numpy docs conventions, and I made sure the documentation renders properly.
• I linked to issues and PRs that are relevant to this PR.

Description

This PR adds the SANN [1] model to TBX. It consists of a model that, given predefined computations of neighbourhoods, is probably as expressive as a Simplicial Message Passing Network. It consists mainly of an MLP and aggregations based on Simplicial complexes.

Issue

This is important since it adds a fast and expressive way to test different embedding functions without incurring in costly message passing among simplifies.

Additional context

Refer to Gurugubelli, S., & Chepuri, S. P. (2024). SaNN: Simple Yet Powerful Simplicial-aware Neural Networks. In The Twelfth International Conference on Learning Representations. for more information.

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Codecov Report

Attention: Patch coverage is 18.83117% with 125 lines in your changes missing coverage. Please review.

Project coverage is 82.17%. Comparing base (9939f39) to head (8af8846).

Files with missing lines	Patch %	Lines
...rms/data_manipulations/precompute_khop_features.py	9.09%	60 Missing ⚠️
topobenchmarkx/nn/readouts/sann.py	27.27%	24 Missing ⚠️
...enchmarkx/transforms/feature_liftings/duplicate.py	26.92%	19 Missing ⚠️
...obenchmarkx/nn/wrappers/simplicial/sann_wrapper.py	25.00%	15 Missing ⚠️
topobenchmarkx/evaluator/evaluator.py	0.00%	5 Missing ⚠️
topobenchmarkx/loss/loss.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
- Coverage   85.34%   82.17%   -3.18%     
==========================================
  Files         108      112       +4     
  Lines        3044     3197     +153     
==========================================
+ Hits         2598     2627      +29     
- Misses        446      570     +124     

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