Performance/new data manager

[JTHesse]

Before submitting your PR, please review the following checklist:

• CONSIDER adding a unit and/or fullscale test if your PR resolves an issue.
• DO keep pull requests small so they can be easily reviewed.
• DO make sure unit and fullscale tests pass.
• DO make sure not to introduce any compiler warnings.
• AVOID breaking the continuous integration build.
• AVOID making significant changes to PeriLab's overall architecture.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 95.48023% with 8 lines in your changes missing coverage. Please review.

Project coverage is 83.96%. Comparing base (7304cea) to head (d2823e7).
Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Core/data_manager.jl	95.45%	7 Missing ⚠️
src/Support/helpers.jl	90.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
+ Coverage   83.52%   83.96%   +0.43%     
==========================================
  Files          74       74              
  Lines        5682     5594      -88     
==========================================
- Hits         4746     4697      -49     
+ Misses        936      897      -39     

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