Create battery benchmark methods

[NicolaCourtier]

Description

Create some high-level classes to enable new users to get started with common battery parameterisation tasks.

Issue reference

Fixes #124

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.
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Type of change

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• Testing: Additional tests to improve coverage or confirm functionality.
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[codecov]

Codecov Report

❌ Patch coverage is 99.28401% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.24%. Comparing base (0a55c30) to head (d13b43b).
⚠️ Report is 27 commits behind head on develop.

Files with missing lines	Patch %	Lines
pybop/applications/gitt_methods.py	96.49%	2 Missing ⚠️
pybop/models/lithium_ion/basic_SPMe.py	98.36%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #644      +/-   ##
===========================================
+ Coverage    99.22%   99.24%   +0.01%     
===========================================
  Files           68       72       +4     
  Lines         4922     5265     +343     
===========================================
+ Hits          4884     5225     +341     
- Misses          38       40       +2     

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[brosaplanella]

Looks great, thanks!

[BradyPlanden]

This is looking great @NicolaCourtier. I've left some comments, I think most of them are smaller updates with one or two requesting a bit of refactoring.

[NicolaCourtier]

The benchmarks are failing for an unrelated reason, so this PR is now passing the tests.