Refactor optimisation result

[muhammedsogut]

Description

This is slightly changing the presentation of results. Currently, they are presented in a list but this is now the best way as the user will struggle to understand which value is for which parameter. This PR will construct a dictionary with all the results including the standard deviation. Also, initial parameters can be accessed from result.

Fixes #10 #21

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #) - note reverse order of PR #s. If necessary, also add to the list of breaking changes.

• [x] New feature (non-breaking change which adds functionality)
• [ ] Optimization (back-end change that speeds up the code)
• [ ] Bug fix (non-breaking change which fixes an issue)

Key checklist

• [x] No style issues: $ python -m nox -s lint
• [ ] All tests pass: $ python -m nox -s unit examples integration
• [ ] Coverage is complete $ python -m nox -s coverage
• [ ] The documentation builds: $ python -m nox -s sphinx

Further checks

• [ ] Code is commented, particularly in hard-to-understand areas
• [ ] Tests added that prove fix is effective or that feature works

[muhammedsogut]

@PipGrylls Could you have a look at test_optimisation_result.py? I refactor the result having a dictionary rather than a list. However, this has caused a problem on tests. I actually finished the PR, all of the example notebooks are working. I need your help to modify tests to get it passed. Thanks.