adds dictionary_learning converters

[anthonyduong9]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes
• I have not rewritten tests relating to key interfaces which would affect backward compatibility

You have tested formatting, typing and tests

• I have run make check-ci to check format and linting. (you can run make format to format code if needed.)

Performance Check.

If you have implemented a training change, please indicate precisely how performance changes with respect to the following metrics:

• L0
• CE Loss
• MSE Loss
• Feature Dashboard Interpretability

Please links to wandb dashboards with a control and test group.

[codecov]

Codecov Report

Attention: Patch coverage is 6.15385% with 61 lines in your changes missing coverage. Please review.

Project coverage is 73.48%. Comparing base (976aa4b) to head (84c4d79).

Files with missing lines	Patch %	Lines
sae_lens/toolkit/pretrained_sae_loaders.py	6.15%	61 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #477      +/-   ##
==========================================
- Coverage   74.84%   73.48%   -1.36%     
==========================================
  Files          19       19              
  Lines        3224     3289      +65     
  Branches      467      479      +12     
==========================================
+ Hits         2413     2417       +4     
- Misses        645      706      +61     
  Partials      166      166              

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