Add experimental circuit model fitting notebook

[BradyPlanden]

This PR does the following:

• Adds M50 data from: https://github.com/WDWidanage/Simscape-Battery-Library/tree/main/Examples/parameterEstimation_TECMD/Data
• Increments pre-commit max file size
• Adds a single-pulse fitting example
  • Example validation of fit
  • Multi-fit (probably needs Allow multiple datasets & models at once #238)
• Converts the M50 data into an accessible object (CSV, HDF5, Pickle, Parquet)

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.

Issue reference

Fixes #170

Review

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• Updated the CHANGELOG.md in reverse chronological order (newest at the top) with a concise description of the changes, including the PR number.
• Noted any breaking changes, including details on how it might impact existing functionality.

Type of change

• New Feature: A non-breaking change that adds new functionality.
• Optimization: A code change that improves performance.
• Bug Fix: A non-breaking change that addresses an issue.
• Documentation: Updates to documentation or new documentation for new features.
• Refactoring: Non-functional changes that improve the codebase.
• Style: Non-functional changes related to code style (formatting, naming, etc).
• Testing: Additional tests to improve coverage or confirm functionality.
• Other: Adds notebook examples & data

Key checklist:

• No style issues: $ pre-commit run (or $ nox -s pre-commit) (see CONTRIBUTING.md for how to set this up to run automatically when committing locally, in just two lines of code)
• All unit tests pass: $ nox -s tests
• The documentation builds: $ nox -s doctest

You can run integration tests, unit tests, and doctests together at once, using $ nox -s quick.

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• Code is well-commented, especially in complex or unclear areas.
• Added tests that prove my fix is effective or that my feature works.
• Checked that coverage remains or improves, and added tests if necessary to maintain or increase coverage.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.44%. Comparing base (5d5985d) to head (d5a550c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #241      +/-   ##
===========================================
+ Coverage    95.42%   95.44%   +0.01%     
===========================================
  Files           36       36              
  Lines         1990     1998       +8     
===========================================
+ Hits          1899     1907       +8     
  Misses          91       91              

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[NicolaCourtier]

This looks great! I'm approving with 2 very minor comments, thanks @BradyPlanden!