#282 Restructure examples/ directory

[arjxn-py]

Description

This PR restructures the examples directory to provide a more organized and user-friendly entry point for users seeking specific functionality.

Issue reference

Fixes #282

Review

Before you mark your PR as ready for review, please ensure that you've considered the following:

• 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.
• Examples: A change to existing or additional examples.
• 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: (Insert description of change)

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.

Further checks:

• 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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.35%. Comparing base (f72a85e) to head (e71f16e).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #375      +/-   ##
===========================================
- Coverage    97.47%   97.35%   -0.13%     
===========================================
  Files           42       42              
  Lines         2418     2418              
===========================================
- Hits          2357     2354       -3     
- Misses          61       64       +3     

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[arjxn-py]

I think this is ready for an initial review, I've covered most of the notebooks and scripts in #282-comment, example tests might be failing right now which i'll work on to fix.
However there's one notebook that's repeating in Getting Started/ & Design Optimisation/ i.e. spm_electrode_design

[arjxn-py]

Tests are also passing now.
cc: @NicolaCourtier @BradyPlanden

[NicolaCourtier]

Hi @arjxn-py, thanks for sharing your progress on this issue! A few comments:

• please consider whether to put scripts and notebooks together in the new folder structure or keep separate (currently the new folders are all stored within examples/notebooks which will make the scripts difficult to find)
• let's merge and rename LG_M50_ECM/data into just LGM50_data
• the new plotting_a_dataset.ipynb is more like what I was imagining for importing_a_pybamm_model (importing, running and plotting the result of a PyBaMM model)
• just "plotting a dataset" would be like the start of LGM_50_identification

Thanks again, please let me know if any questions and request a review when you are ready.