[ENH] Add DummyClusterer

[aadya940]

Closes #1528 .

[aeon-actions-bot]

Thank you for contributing to aeon

I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ].
I have added the following labels to this PR based on the changes made: [ $\color{#4011F3}{\textsf{clustering}}$ ]. Feel free to change these if they do not properly represent the PR.

The Checks tab will show the status of our automated tests. You can click on individual test runs in the tab or "Details" in the panel below to see more information if there is a failure.

If our pre-commit code quality check fails, any trivial fixes will automatically be pushed to your PR unless it is a draft.

Don't hesitate to ask questions on the aeon Slack channel if you have any.

[TonyBagnall]

great stuff, but could you also test the _score function for coverage?

[aadya940]

great stuff, but could you also test the _score function for coverage?

I will, sorry for the oversight. 🙂

[aadya940]

@TonyBagnall Hello, I don't think the failure is related to this PR. wdyt?

[MatthewMiddlehurst]

Agreed, rerunning it.

Unrelated to this PR but I'm not sure I'm a fan of score being the way it is currently. See #1530.